Many corporation use Twitter to get their messages out and to start a corporate conversation.
Even Arnold Schwarzenegger is using twitter: http://twitter.com/schwarzenegger
Here is an overview of Corporate Twitter Activities (Via Fluent Simplicity):
Media
ABA Journal http://twitter.com/abajournal
About.com Books http://twitter.com/aboutbooks
AdAge http://twitter.com/adage
AL.com (Alabama News) http://twitter.com/aldotcom
Alltop http://twitter.com/guykawasaki
Ann Arbor News (Ann Arbor, MI) http://twitter.com/AnnArborNews
Asheville Citizen-Times (Asheville, NC) http://twitter.com/asheville
BBC http://twitter.com/BBC (Full list: http://menti.net/?p=17)
Birmingham News (Birmingham, AL) http://twitter.com/birmingham_news
BusinessWire.com http://twitter.com/tradeshownews
CBC News http://twitter.com/cbcnews
Chicago Tribune http://twitter.com/coloneltribune
Christian Activities http://twitter.com/ChristianActs
CMSWire.com http://twitter.com/cmswire
CNET News http://twitter.com/CNETNews
CNN http://twitter.com/cnnbrk Unofficial. See comment below by James Cox.
Competitor Magagine: http://www.twitter.com/competitorATL
Computer World http://twitter.com/computerworld
Conde Nast Portfolio http://twitter.com/Portfolio
Craft Magazine http://twitter.com/craft
Current TV:
VC2 (Viewer Contributed Content) team http://twitter.com/currentVC2
website community team http://twitter.com/current_com
The Italian network http://twitter.com/current_it
Des Moines Register http://twitter.com/dmregister
Detour Magazine http://twitter.com/DETOURmagazine
Digg http://twitter.com/digg
DIRECTV http://twitter.com/DIRECTV
Drudge Report http://twitter.com/Drudge_Report
Editor In Chief: Everyday Food Magazine http://twitter.com/everydayfooddeb
Edmunds.com http://twitter.com/edmunds
Fast Company http://twitter.com/fastcompany
Financial Times http://twitter.com/financialtimes
Financial Times – Finance News http://twitter.com/FTfinancenews
Flint News http://twitter.com/flintjournal
Fox Chicago http://twitter.com/foxchicago
Fox News http://twitter.com/foxnews
Frederick News Post (Frederick, MD) http://twitter.com/fredericknewspo
Fresnobee.com (Fresno, CA) http://www.twitter.com/fresnobee
Fresnobeehive.com (Fresno, CA) http://www.twitter.com/fresnobeehive
Golf For Women (A Golf Digest publication) http://twitter.com/golfforwomen
Grand Rapids Press (Grand Rapids, MI) http://twitter.com/GRPress
Harpers http://twitter.com/harpers
I’m Not Obsessed http://twitter.com/Imnotobsessed
Indian Media Television News Channel – http://twitter.com/ibnlive
Indian Technology Portal – http://twitter.com/tech2india
InformationWeek http://www.twitter.com/informationweek
InStyle Magazine http://twitter.com/InStyleMagazine
ITPro (UK) http://twitter.com/itpro
JamBase http://twitter.com/jambase
Kalamazoo Gazette (Kalamazoo, MI) http://twitter.com/Kzoo_Gazette
KDKA (Pittsburgh, PA) http://twitter.com/kdka
Knight Center for Environmental Journalism http://twitter.com/GreatLakesEcho
Knoxville News Sentinel (Knoxville, TN) http://twitter.com/knoxnews
KPBS (San Diego, CA) http://twitter.com/kpbsnews
KUT (Austin, TX) http://twitter.com/kutaustin
KWMU (St. Louis, MO) http://twitter.com/KWMU
LA Times Breaking News http://twitter.com/latimesbreaking
LA Times Local http://twitter.com/latimeslocal
Macworld http://twitter.com/macworld
Marin Independent Journal: http://www.twitter.com/marinij
Marin Independent Journal – Sports: http://www.twitter.com/marinij_sports
Marin Independent Journal – Entertainment: http://www.twitter.com/marinij_ent
Marin Independent Journal – Opinion: http://www.twitter.com/marinij_opin
Marketing Profs http://twitter.com/MarketingProfs
Marvel Entertainment http://twitter.com/Marvel
Mass Live News / The Republican (Western, MA) http://twitter.com/masslivenews
MyNC (Triangle, NC) http://twitter.com/MyNC
Nashua Telegraph (Nashua, NH) http://twitter.com/NashuaTelegraph
The New Yorker http://twitter.com/NewYorkerDotCom
NewMediaAge http://twitter.com/NewMediaAge
New Jersey Monthly http://twitter.com/njmonthly
NewsOK: http://twitter.com/NewsOK
NJ News (The Star-Ledger and NJ.com) http://twitter.com/NJ_News
Nola.com/Times-Picayune (New Orleans, LA) http://twitter.com/nolanews
NPR http://twitter.com/nprnews
NY Times http://twitter.com/nytimes (The NYT also offers other sections in twitter)
The Oregonian (Portland, Oregon) http://twitter.com/oregonian (There are additional sections available)
Official XBox Magazine http://twitter.com/OXM
The Onion http://twitter.com/theonion
O’Reilly Media http://twitter.com/oreillymedia
Orlando Sentinel http://twitter.com/orlandosentinel
Pandora Radio http://twitter.com/pandora_radio
PC World http://www.twitter.com/PC_World
PittsburghPost http://twitter.com/pittsburghpost
The Post-Standard (Syracuse, NY) http://twitter.com/PostStandard
PR Newswire http://twitter.com/prnewswire
The Progressive http://twitter.com/theprogressive
Pseudorant http://twitter.com/Pseudorant
Quad City Times (Davenport, IA) http://twitter.com/qctimes
QueensSpeech http://twitter.com/QueensSpeech
Reuters http://twitter.com/
Reveille Magazine http://twitter.com/reveille
Revision3 http://twitter.com/revision3
RugbyZone by MediaZone http://twitter.com/rugbyzone
Saginaw News (Saginaw, MI) http://twitter.com/saginawnews
Shoestring Media http://twitter.com/shoestring
SMITH Magazine http://twitter.com/smithmag
St.Louis Post-Dispatch (St. Louis, MO) http://twitter.com/stltoday
The Sun Financial Diary http://twitter.com/SunFinancial
TBO.com (Tampa Bay Online) http://twitter.com/TBOcom
T3N Magazine for Open Source http://twitter.com/yeebase_t3n
Times OnLine http://twitter.com/TimesWorldNews
Travel Channelhttp://www.twitter.com/travelchannel
Union-Bulletin News (Walla Walla, Wash.) http://twitter.com/ubnews
USA Today On Politics http://twitter.com/USATOnPolitics
The Wall Street Journal http://twitter.com/WSJ
WBEZ (Chicago, IL) http://twitter.com/WBEZ
WC WorkersComp News Network http://twitter.com/wcconnections
WFPL (Louisville, KY) http://twitter.com/wfplnews
WDET 101.9 FM (Detroit, MI) http://twitter.com/wdet
theWAHMmagazine http://twitter.com/thewahmmagazine
WHP (CBS-affiliate) http://twitter.com/whptv
Wired News http://twitter.com/wired
WITF-FM (Harrisburg PA) http://twitter.com/witfnews
WNCN (Raleigh, NC) http://twitter.com/NBC17
WNRK (Dearborn, MI) http://twitter.com/wknr
WNYC (New York, NY) http://twitter.com/wnyc
WOSU (Columbus, OH) http://twitter.com/WOSU
WPXI (Pittsburgh, PA) http://twitter.com/wpxi
The Wright TV Show http://twitter.com/drwright1
WUOM (Ann Arbor, MI) http://twitter.com/WUOM
WVIR (Charlottesville, VA) http://twitter.com/NBC29
Yankee Magazine http://twitter.com/yankeemagazine
ZDNet http://twitter.com/zdnett
Events
ASQ Conference http://twitter.com/NQEC
BusinessWire.com http://twitter.com/tradeshownews
EmTech08 http://twitter.com/EmTech08
Ignite Philly http://twitter.com/ignitephilly
Internet Strategy Forum Summit 2008 http://twitter.com/summit
Rocking the Daisies http://twitter.com/RockingTheDaisy
VizThink: http://twitter.com/vizthink
Wimgo: http://twitter.com/Wimgo
Publishing
Center Street: http://twitter.com/centerstreet
Faith Words: http://twitter.com/faithwords
Forever Romance: http://twitter.com/foreverromance
Grand Central Publishing: http://twitter.com/grandcentralpub
Little, Brown and Company: http://twitter.com/littlebrown
MEP Publishers http://twitter.com/meppublishers
Septagon Studios http://twitter.com/septagonstudios
Yale Press http://twitter.com/yalepress
Zondervan http://twitter.com/zondervan
Movies
Bloody Good Horror http://www.twitter.com/bghorror
Bollywood Movie – http://www.twitter.com/saawariya
Chronicles of Narnia: Prince Caspian – http://www.twitter.com/princecaspian
Cinema Fromage http://www.twitter.com/cinemafromage
Airlines/Travel
American Automobile Association http://twitter.com/AAAnews
Boingo (Wifi for travelers) http://twitter.com/boingo
Booking Buddy http://twitter.com/BookingBuddy
BrilliantTrips http://twitter.com/BrilliantTrips
British Airways http://twitter.com/BritishAirways
Carnival Cruise Lines http://twitter.com/CarnivalCruise
Delta http://twitter.com/deltaairlines
Global Base Camps http://twitter.com/GlobalBasecamps
HotelChatter: http://twitter.com/HotelChatter
Jetblue http://twitter.com/JetBlue
Mahalo Travel http://twitter.com/mahalotravel
Seat Guru http://twitter.com/SeatGuru
Smarter Travel http://twitter.com/SmarterTravel
Southwest Airlines http://twitter.com/SouthwestAir
Spinn Cafe of Lhasa, Tibet http://twitter.com/spinncafe
Travel Rants: http://twitter.com/travelrants
UK Travel Weekly: http://twitter.com/twblog
Virgin America http://twitter.com/thisishowtofly
Finance & Banking
Capgemini http://twitter.com/Capgemini
Citizens Bank of Canada http://twitter.com/citizensbanker
Lenderflex http://twitter.com/lenderflex
LenderflexCares http://twitter.com/lenderflexcares
QuickBooks http://twitter.com/quickbooks
QuickenLoans http://twitter.com/quickenloans
Quizzle (Quicken) http://twitter.com/quizzle
UT Federal Credit Union http://twitter.com/UTFCU
Hotels/Resorts
Heavenly Ski Resort (South Lake Tahoe) http://www.twitter.com/skiheavenly
Luxor Hotel and Casino http://twitter.com/LuxorLV
Mandalay Bay Resort and Casino http://twitter.com/Robert_Hoffmann
Marriott International http://twitter.com/marriottpr
MGM MIRAGE http://twitter.com/VegasConcierge
MGM Grand Hotel and Casino http://twitter.com/Mgmgrand
Treasure Island Hotel and Casino http://twitter.com/VegasDV
Retailers
Amazon Twitter Bookfinder http://www.twitter.com/amazon
Amazon.com Deals: http://twitter.com/amazondeals
Apple: http://twitter.com/appleinc (Questionable)
Bramble Berry Soapmaking Supplies http://twitter.com/brambleberry
Build A Bear http://twitter.com/buildabear
Build A Sign http://twitter.com/buildasign
Buy.com http://twitter.com/Buy_com (Questionable)
Dell (In depth)
EasyAutoSales http://twitter.com/easyautosales
FitFuel http://twitter.com/fitfuel
Geeks.com http://Twitter.com/computergeeks
GlobalGolf.com http://twitter.com/globalgolf
Home Depot (USA) http://twitter.com/thehomedepot
Home Depot (Canada) http://twitter.com/homedepotcanada
Israeli Wine Direct http://twitter.com/israeliwine
KangarooBoo.com http://twitter.com/KangarooBoo
Motorola http://www.twitter.com/motodeals
Mystery Bookstore (LA, CA) http://twitter.com/mysterybooks
Paw Luxury http://twitter.com/PawLuxury
Princess Time Boutique http://twitter.com/princesstimetoy
Scrapless Press http://twitter.com/scraplesspress
Shoe Smitten http://twitter.com/ShoeSmitten
ShopLeisaMarie.com http://twitter.com/leisamarie
SierraSnowboard http://twitter.com/Sierrasnowboard
Skimbaco http://twitter.com/skimbaco
SproutSoup http://www.twitter.com/sproutsoup
Studio Dell http://twitter.com/StudioDell
Timbuk2 Bags http://twitter.com/timbuk2
Whole Foods http://twitter.com/wholefoods
Wine Enthusiast http://twitter.com/WineEnthusiast
WOOT: http://twitter.com/woot
WOOTBlabber: http://twitter.com/wootblabber
Zappos http://twitter.com/zappos
Business/Entrepreneurship
Avil Beckford http://twitter.com/avilbeckford
Conjunctured (Coworking space in Austin, TX) http://twitter.com/conjunctured
The Savvy Entrepreneur http://twitter.com/cfavreau
TechStars http://twitter.com/techstars
Professional Services
Adaptive Path http://twitter.com/AdaptivePath
AIRS Corp. http://twitter.com/airscorp
As You Wish Photography http://twitter.com/asyouwish
BearingPoint http://twitter.com/bearingpoint
The Bivings Group http://twitter.com/bivings
Blogging-Ads.com http://twitter.com/blogginads
Bulldog Solutions http://twitter.com/BulldogSolut
Burson-Marsteller http://twitter.com/BMdigital
Business Smart Tools http://twitter.com/BusSmartTools
Career Coach http://twitter.com/cfocoach
CellCon Consulting http://twitter.com/cellcon
Converseon http://twitter.com/converseon
CultureSmith Consulting http://www.twitter.com/cherylsmith999
Custom Scoop (Media Intel) http://twitter.com/sarahwurrey & http://twitter.com/jenzings
Deacons http://twitter.com/Deacons (*** A Law Firm)
E-consultancy http://twitter.com/econsultancy
Emergence Business Coaching http://twitter.com/CoachCharrise
The Engaging Brand http://twitter.com/Engagingbrand
Finn Digital http://twitter.com/FinnDigital
Fleishman-Hillard http://twitter.com/Fleishman (UPDATES PROTECTED)
Forrester http://twitter.com/forrester
Fresh ID http://twitter.com/KrisColvin
FusedLogic http://www.twitter.com/fusedlogic
getclosure! / South African online complaints and consumer affairs http://twitter.com/getclosure
Halo Secretarial Services http://twitter.com/halosecretarial
H&R Block http://twitter.com/hrblock
Healthcare Communications LLC http://twitter.com/healthcomm
iDoctor (Internet Marketing) http://twitter.com/iDoctor
Mari Smith (Facebook Business Coach) http://twitter.com/marismith
mdm (Event agency) http://www.twitter.com/mdmltd
Media Components http://twitter.com/denins
Michelle Wolverton (Virtual Personal Assistant) http://twitter.com/chelpixie
Monster Careers http://twitter.com/MonsterCareers
MyCreativeTeam http://twitter.com/MyCreativeTeam
nikkipilkington.com (SEO Firm) http://twitter.com/NikkiPilkington
On Target Media Group http://www.twitter.com/otmg
Outcome Labs http://twitter.com/outcomelabs
P&G Social Media Lab http://twitter.com/socialmedialab
Park & Co http://twitter.com/parkandco
Pure Visibility http://twitter.com/lgirard
PerkettPR http://twitter.com/PerkettPR
Pistachio http://twitter.com/Pistachio
Q1Labs http://twitter.com/Q1Labs
Red Door Interactive http://twitter.com/reddoor
Web Success (SEO Firm) http://twitter.com/websuccess
Worship Kitchen http://twitter.com/WorshipKitchen
Health Care
FitFuel http://twitter.com/fitfuel
MediFast http://twitter.com/choosemedifast
Mike Okouchi, D.C. (Velocity Wellness Center) http://twitter.com/akdocmike
Zorgbeheer http://twitter.com/zorgbeheer
Industry Analysts & Subject Matter Experts
Maurene Caplan Grey http://twitter.com/mgrey
Jim Cahill / DeltaV http://twitter.com/JimCahill
Michael Coté / RedMonk- http://www.twitter.com/cote
James Governor / RedMonk- http://www.twitter.com/monkchips
Stephen O’Grady / RedMonk- http://www.twitter.com/sogrady
Tom Raftery / RedMonk- http://www.twitter.com/tomraftery
Jonathan Yarmis /AMR Research http://www.twitter.com/jyarmis
Editors and Producers
Karl Brauer / Editor in Chief, Edmunds.com http://twitter.com/karlbrauer
Ryan Penagos / Editor, Marvel.com http://twitter.com/agent_m
Lance Turner / Internet Editor, ArkansasBusiness.com http://twitter.com/LT
Executives
*Note: As part of the brand index, I am focusing on principals or senior executives who are helping to push the envelope of social media.
John Battelle http://twitter.com/johnbattelle
Kevin Burke http://twitter.com/KB33
Jason Calacanis / Mahalo http://twitter.com/JasonCalacanis
Andy Chen / CEO, Buzzillions.com http://twitter.com/Buzzandy
Rev. David Ciancio / Owner, The Syndicate www.twitter.com/yeahman
Samantha Fein / Threxy.com http://twitter.com/fein
John Furrier / Furrier.org http://twitter.com/furrier
Andy Gadiel / Jambase http://www.twitter.com/andygadiel
Brian Halligan / CEO HubSpot: http://twitter.com/bhalligan
Greg Hoy / Happy Cog http://twitter.com/hoyboy
Michael Hyatt / President & CEO of Thomas Nelson http://twitter.com/michaelhyatt
Iman Jalali / Train Signal, Inc. http://twitter.com/
Ruwan Jayatilleke / SVP, Strategic Development, Marvel Entertainment, Inc. http://twitter.com/RuwanJay
Guy Kawasaki / Alltop.com http://twitter.com/guykawasaki
Jason Kintzler / Pitch Engine http://twitter.com/PitchEngine
Jean Ann Van Krevelen / President, Escalation Consulting http://twitter.com/jeanannvk
Anton Mannering / benchd.com http://twitter.com/antonmannering
Marc Meltzer / Owner, The Syndicate www.twitter.com/mephilo
Sean Moffitt / President, Agent Wildfire http://twitter.com/seanmoffitt
Ted Murphy / CEO, IZEA http://twitter.com/tedmurphy
Rob Lane / CEO, Overlay.tv http://twitter.com/roblane
Kevin O’Keefe/ Lexblog http://twitter.com/kevinokeefe
Tim O’Reilly http://twitter.com/timoreilly
Christine Perkett / PerkettPR http://twitter.com/missusP
David Prager / VP of Special Projects, Revision 3 http://twitter.com/dlprager
Jon Radoff / GamerDNA http://twitter.com/jradoff
Kevin Rose, Founder of Digg: http://twitter.com/twitter.com/kevinrose
Ian Schafer / Deep Focus http://twitter.com/ischafer
Peter Shankman http://twitter.com/skydiver
Jared M. Spool / User Interface Engineering http://twitter.com/jmspool
Soren Stamer / CEO, Core Media http://twitter.com/heartnsoul
Biz Stone / Co-Founder of Twitter http://twitter.com/biz
Joseph Thornley / Thornley Fallis & 76 Design http://twitter.com/thornley
Mike Troiano / Matchmine.com http://twitter.com/miketrap
Father Roderick Vonhögen / Star Quest Production Network http://twitter.com/FatherRoderick
Ben Watson / VP, SMM Overlay.tv http://twitter.com/bitpakkit
Sarik Weber / VP, Cellity http://twitter.com/Sarik
Chris Winfield / 10e20.com http://twitter.com/chriswinfield
Wei Yang / EasyAutoSales.com http://twitter.com/wei_yang
Nadav Zin / VP, Product Overlay.tv http://twitter.com/nadavzin
Venture Capital Firms
Dan Rua, Florida Venture Blog: http://twitter.com/danrua
Fred Wilson, A VC: http://twitter.com/fredwilson
Brad Feld, Feld Thoughts: http://twitter.com/bfeld
SaaS
37 Signals http://twitter.com/37signals
FreshBooks http://twitter.com/freshbooks
HubSpot http://twitter.com/hubspot
Intuit QuickBase http://twitter.com/IntuitQuickBase
Iterasi http://twitter.com/iterasi
Jetrecord http://twitter.com/jetrecord
LessAccounting.com http://twitter.com/lessaccounting
Mobile Commons http://twitter.com/mobilecommons
Mzinga http://twitter.com/mzinga
NewsGator http://twitter.com/Newsgatorwidget
PublishPalLite.com: http://twitter.com/publishpallite
SnapLogic http://twitter.com/chris_marino
Software
Norton Safe Web (Symantec): http://twitter.com/nortonsafeweb
QuickBooks http://twitter.com/quickbooks
Siemens PLM Software http://twitter.com/SiemensPLM
Telecom/VoIP
Rebtel http://twitter.com/_Rebtel
Education
Allegheny College http://twitter.com/alleghenycol
Aquinas College http://twitter.com/AQCampusLife
Auburn University http://twitter.com/AuburnU
Butler University http://twitter.com/butlersports
Calvin College http://twitter.com/CalvinCollege
Cornell News http://twitter.com/cornellnews
George Mason University, Center for History and New Media http://twitter.com/chnm
Franklin College http://twitter.com/FranklinCollege
Hofstra University http://twitter.com/HofstraU (Questionable – UPDATES PROTECTED)
Ithaca College News http://twitter.com/intercom
Knight Center for Environmental Journalism http://twitter.com/GreatLakesEcho
Lynchburg College http://twitter.com/lynchburg
McGill University Career Development Office http://twitter.com/cdolaw
Michigan State http://twitter.com/Michigan_State
Missouri University of Science and Technology http://twitter.com/missourisandt/
MODUL University Vienna, Austria http://twitter.com/MUV
Norwich University http://twitter.com/NorwichNews
Notre Dame http://twitter.com/NDdotEDU
Pacific Science Center http://twitter.com/pacsci
Pitzer College http://twitter.com/pitzercollege
Rasmussen College http://twitter.com/rasmussen
RMIT University http://twitter.com/RMIT
Roanoke College http://twitter.com/roanokecollege
Saint Anselm http://twitter.com/saintanselm
Southern Methodist University http://twitter.com/smudallas
SUNY New Paltz http://twitter.com/newpaltz
Universe Awarenss for Young Children http://twitter.com/unawe
University of Kentucky http://twitter.com/WildcatThursday
University of Maryland , Maryland Institute for Technology in the Humanities http://twitter.com/UMD_MITH
University of Michigan – The University Club http://twitter.com/uclub
University of Wisconsin-Green Bay http://twitter.com/uwgb
Virginia Commonwealth University Information Security http://twitter.com/vcuinfosec
Wayne State University (Detroit, MI) http://twitter.com/waynestate
Music Education
National Guitar Workshop: http://twitter.com/guitarworkshop
Manufacturing & Related Services
Blackberry http://twitter.com/blackberry
DeltaV (Automation Systems) http://twitter.com/DeltaV
Ford http://twitter.com/FoMoCoNA (Questionable)
GM http://twitter.com/GMblogs
Honda http://twitter.com/Alicia_at_Honda Confirmed
Mining
Rio Tinto http://www.twitter.com/riotinto
Energy Related
Exxon Mobile Corp http://twitter.com/ExxonMobilCorp Unofficial: See this post for more information.
Non-Profit Organizations
ACLU Washington http://twitter.com/ACLU_WA
American Academy of Family Physicians http://twitter.com/aafp
American Association for Cancer Research: http://www.twitter.com/AACR
AAA (American Automobile Association) http://twitter.com/AAAnews
American Cancer Society http://twitter.com/AmericanCancer
American Heart Association http://twitter.com/foundersheart
American Public Health Association http://twitter.com/PublicHealth
American Red Cross http://twitter.com/RedCross
American Society for Quality http://twitter.com/ASQ
Association for International Cancer Research http://twitter.com/AICR
Boomer Esiason Foundation http://twitter.com/cysticfibrosis
Christian Foundation for Children and Aging http://twitter.com/cfca
Dogs Trust (UK) http://twitter.com/dogstrust
Family Violence Prevention Fund http://twitter.com/Give_Respect
First Person Arts http://twitter.com/FirstPersonArts
Getting2Tri: http://www.twitter.com/g2tprez
Global Giving http://twitter.com/GlobalGiving
The Leukemia & Lymphoma Society http://twitter.com/llsusa
March of Dimes http://twitter.com/marchofdimes
Mail our Military http://twitter.com/MailOurMilitary
National Association of Independent Colleges and Universities http://www.twitter.com/naicu
National Federation of Independent Business (NFIB) http://www.twitter.com/nfib/
New Media Consortium https://twitter.com/newmediac
New York State Association for Computing and Technology in Computing http://twitter.com/NYSCATE
OEN – Oregon Entrepreneurs Network http://twitter.com/oen_org
Principled Innovation LLC http://www.twitter.com/pinnovation
The Salvation Army (Can.) http://twitter.com/salvationarmy
Urban Land Institute http://twitter.com/UrbanLandInst
World Resources Institute http://twitter.com/worldresources
World Vision Australia’s Stir Movement http://twitter.com/stirmyworld
Unions
Freelancer’s Union http://twitter.com/freelancersu
Service Employees International Union http://twitter.com/seiu
Government (UK)
Unofficial service of official news feeds from UK Government http://twitter.com/HMGOV
TellThemWhatYouThink.org http://twitter.com/govconsultation
CommunitiesUK http://twitter.com/CommunitiesUK
DIUS http://twitter.com/DIUS_Science
UK Foreign and Commonwealth Office http://twitter.com/foreignoffice
Government (US)
Austin, TX PD http://twitter.com/AustinPD (UPDATES PROTECTED)
Colorado http://twitter.com/coloradogov
Committee on Education and Labor, US House of Representatives/Rep. George Miller (D-CA) http://twitter.com/edlabordems
Franklin, MA PD http://twitter.com/franklinpolice (Needs more updates)
Hillsborough, NC http://twitter.com/Hillsborough
Commonwealth of Kentucky http://twitter.com/kygov
LAFD http://twitter.com/LAFD
Louisville, KY http://twitter.com/louisvillekygov
Maine (consumer alerts- inactive) http://twitter.com/www_maine_gov
NASA http://twitter.com/NASA
NASA: Mars http://twitter.com/MarsPhoenix
Nebraska http://explore.twitter.com/nebraskagov
Peoria, AZ http://twitter.com/PeoriaAZ
Public Laws (Signing Status) http://twitter.com/publiclaws (SOURCE?)
Republican Study Committee, US House of Representatives http://twitter.com/RSC
Rhode Island http://twitter.com/rigov
South Carolina http://twitter.com/scgov
US House of Representatives (Floor Vote) http://twitter.com/HouseFloor
US Senate (Floor Vote) http://twitter.com/SenateFloor
USAgov http://twitter.com/USAgov
Utah http://twitter.com/UtahGov
Vermont http://twitter.com/vermontgov
Virginia Beach, VA – http://twitter.com/CityofVaBeach
The White House http://twitter.com/TheWhiteHouse
WomensHealth.gov http://twitter.com/womenshealth
Public Transit
BART (San Francisco) http://twitter.com/SFBART
MTA Bike Plus (NYC) http://twitter.com/mtaplusbike
Culture
The Adler Planetarium (Chicago, IL) http://twitter.com/fieldmuseum
The Brooklyn Museum (Brooklyn, New York) http://twitter.com/brooklynmuseum
Caprai Museum (Foligno, Italy) http://twitter.com/CapraiMuseum
Cincinnati Art Museum (Cincinnati, OH) http://twitter.com/cincyartmuseum
The Field Museum (Chicago, IL) http://twitter.com/fieldmuseum
The Franklin Institute (Philadelphia, PA) http://twitter.com/thefranklin
The Manitoba Museum (Manitoba, Can.) http://twitter.com/ManitobaMuseum
Rubin Museum of Art (New York, NY) http://twitter.com/RubinMuseum
San Francisco Zoo (San Francisco, CA) http://twitter.com/sfzoo
The Smithsoniam Institution http://twitter.com/smithsonian
Tacoma Art Museum (Tacoma, WA) http://twitter.com/TacomaArtMuseum
Tinku gallery http://www.twitter.com/tinkugallery
US Holocaust Museum http://twitter.com/holocaustmuseum
CVB/DMO’s (Tourism)
Baltimore, MD http://twitter.com/BaltimoreMD
Columbus, OH http://twitter.com/ExpCols
Columbus, SC http://twitter.com/columbiasc
New York, NY http://twitter.com/NewYorkology
Philadelphia, PA http://twitter.com/uwishunu
Virgina Beach, VA http://twitter.com/VaBeachCVB
Health & Fitness
Daily pregnancy tips from the March of Dimes http://twitter.com/marchofdimes
eDiets http://twitter.com/eDiets
Nutrition for You http://twitter.com/Nu4You_Dennis
Para un embarazo sano y feliz (From the March of Dimes) http://twitter.com/nacersano
Mark Salinas http://twitter.com/Mark_Salinas
Dr. Sarah H. Ullman http://twitter.com/drsarahullman
Motivational Speakers
Divine Purpose http://twitter.com/DivinePurposeMV
Artists
Nantucket Art http://twitter.com/Nantucket_Art
Tech – Support
Firefox http://twitter.com/firefox_answers
GoDaddy http://twitter.com/GoDaddyGuy
Tech – Business/News
Geek and Hype (France) http://twitter.com/GeekandHype
HP News http://twitter.com/hpnews
Media Bistro http://twitter.com/mediabistro
Nobush http://nobosh.com/
TradeVibes http://twitter.com/tradevibes
Tech – Platforms
MySpace Developer Platform http://twitter.com/myspacedevteam
Wordframe http://twitter.com/wordframe
Tech – B2B
Intel http://www.twitter.com/JobsatIntel
Cisco Systems http://twitter.com/CiscoSystems
Sun Microsystems http://twitter.com/SunBlogs
Tech – Search
Wendy Boswell / Websearch.about.com http://twitter.com/wboswell
Open Source
lovdbyless.com http://twitter.com/lovd
Microfotmats http://twitter.com/microformats
OpenEdit: http://twitter.com/openedit
Open.Michigan Initiative http://twitter.com/open_michigan
Mobile applications
Cellity http://twitter.com/cellity
MyxerTones http://twitter.com/myxertones
Tabrio www.twitter.com/tabrio
Social – Blogs
30Boxes http://twitter.com/30boxes
Babyspot.com http://twitter.com/babyspotCEO
Bloggers Blog http://twitter.com/bloggersblog
Conversation Agent http://twitter.com/ConversationAge
Fashion/Beauty Community Coutorture http://twitter.com/coutorture
DanceJam http://twitter.com/DanceJam
David Lat (Above the Law) http://twitter.com/davidlat
DarkUFO (News on ABC’s Lost) http://twitter.com/darkufo
Engadget http://twitter.com/engadget
Editor In Chief: Everyday Food Magazine http://twitter.com/everydayfooddeb
Kyolo http://twitter.com/kyolo
MacLife http://twitter.com/MacLife
Mashable http://twitter.com/mashable
Michigan Innovators http://twitter.com/Innovators
PoshMama http://twitter.com/poshmama
Six Apart http://twitter.com/sixapart
SocialText http://twitter.com/socialtext
Social Media Club (Philadelphia, PA) http://twitter.com/smcphilly
SpoilerTV http://twitter.com/spoilertv
Synthesis.net http://twitter.com/synthesis_net
TechCrunch http://twitter.com/TechCrunch
TechCrunch (France) http://twitter.com/TCFR
Techmeme http://twitter.com/Techmeme
Technorati http://twitter.com/technorati
Twingly.com http://twitter.com/twingly
WordPress http://twitter.com/wordpress
Social – Networks
BITPOM http://twitter.com/bitpom
FantasticToe.com http://twitter.com/fantasticToe
Fling it Girl http://twitter.com/flingitgirl
gamerDNA: http://twitter.com/gamerDNA
LinkedIn http://www.twitter.com/linkedin
Pownce https://twitter.com/pownce
WordFrame http://twitter.com/wordframe
Social – Media & Sharing
Blippr http://twitter.com/blippr
DOPPLR http://twitter.com/dopplrhq
Drop.io http://twitter.com/dropio
FlixWagon http://twitter.com/flixwagon
IdeaBlob http://twitter.com/ideablob
Overlay.tv http://twitter.com/overlaytv
PBwiki: http://twitter.com/PBKrissy
SeenThis? (Social recommendations widget) http://twitter.com/seenthis
SomeeCards.com http://twitter.com/someecards
Trigeia http://twitter.com/Trigeia
Vitrue http://twitter.com/vitrue
Wiki Answers http://twitter.com/WikiAnswers
Social – Bookmarking
Digg.com http://twitter.com/digg_feeds
Fling it Girl http://twitter.com/flingitgirl
Muti (African social news site) http://twitter.com/muti
Reddit.com http://twitter.com/reddit_agent
Social – Portal
Mindshare (Portland, OR) http://twitter.com/pdxmindshare
SavvyAuntie http://twitter.com/SavvyAuntie
Second Life http://twitter.com/secondlife
Second Life Grid Status http://twitter.com/SLGridStatus
Babies & Parenting
BabiesOnline.com http://twitter.com/Babiesonline
Babyspot.com http://twitter.com/babyspotCEO
bfmwear.com http://twitter.com/bfmwear
Healthy Baby Tips from the March of Dimes http://twitter.com/babytips
Kevin Burke / Light Iris and Lucid Marketing http://twitter.com/KB33
Lindsay Lebresco / Social Media Manager, Graco Children’s Products http://twitter.com/lindsaylebresco;
SproutSoup http://www.twitter.com/sproutsoup
TwinsTalk: http://twitter.com/ParentingAuthor
theWAHMmagazine http://twitter.com/thewahmmagazine
Service Providers
AideRSS (Social Media Analysis Firm) http://twitter.com/aiderss
Comcast http://twitter.com/comcastcares
Elastic Lab filmmaker network: http://www.twitter.com/elasticlab
FilmFitti.com http://twitter.com/FilmFitti
GoGrid (Cloud Hosting) http://www.twitter.com/GoGrid
Network Solutions http://twitter.com/NetSolCares
Pixum http://twitter.com/pixum
ServePath (Dedicated Hosting) http://www.twitter.com/ServePath
Sonic.net http://twitter.com/sonicnet;
Surpass Hosting http://twitter.com/surpass
TypeAs, Inc. Efficiency Consulting: http://www.twitter.com/MarinaMartin
Clothing & Apparel
Crocs http://twitter.com/crocsinc
GiftGirl http://www.twitter.com/giftgirl
Consumer Products
Seventh Generation http://twitter.com/seventhgen
Food/Specialty Products
Dewmocracy http://twitter.com/Dewmocracy
Elanas Pantry http://twitter.com/elanaspantry
M&Ms http://twitter.com/msgreen
The Organic Dish: http://twitter.com/theorganicdish
Pangaea Organica http://twitter.com/PangaeaOrganica
Popeyes Chicken http://twitter.com/PopeyesChicken
QinoOneVodka http://twitter.com/QinoOneVodka
Templeton Rye http://twitter.com/templetonrye
Vinquire Wine Search http://twitter.com/vinquire
Whole Foods http://twitter.com/wholefoods
zSweet Sugar Substitute http://twitter.com/brianazsweet
Brewing
21st Amendment http://twitter.com/21stAmendment
BridgePort Breweryhttp://twitter.com/bridgeportbrew
Flying Dog Ales http://twitter.com/flyingdog
Magic Hat http://twitter.com/magichat
Open Source Beer http://twitter.com/opensourcebeer
Scmaltz Brewing http://twitter.com/ShmaltzBrewingW
Shopping
Alex’s Coupons http://twitter.com/tmartini
Buzzillions.com http://twitter.com/Buzzillions
Political/Human Rights
Free Burma http://twitter.com/FreeBurma
Students for a Free Tibet http://twitter.com/teamtibet
Politicians/Elected Officials (UK)
Lynn Featherstone (MP) http://twitter.com/lfeatherstone
The Office of Prime Minister Gordon Brown http://twitter.com/DowningStreet
Tom Watson (MP) http://twitter.com/tom_watson
Politicians/Elected Officials (US)Mayor Mark Begich (D-Anchorage, AK) http://twitter.com/MarkBegich
Representative John Boehner (R-OH) http://twitter.com/johnboehner
Mayor Mark Boughton (R-Danbury, CT) http://twitter.com/MayorMark
Representative Roy Blunt (R-MO) http://twitter.com/RoyBlunt
Representative Eric Cantor (R-VA) http://twitter.com/EricCantor
Lt. Governor John Cherry (D-MI) http://twitter.com/johncherry
Sen. Hillary Clinton (D-NY) http://twitter.com/Hillary2008 (Official Twitter?)
Representative John Culberson (R-TX) http://twitter.com/johnculberson
Governor Jennifer Granholm (D-MI) http://twitter.com/govgranholm
Sen. Jim Inhofe (R-OK) http://twitter.com/jiminhofe
Representative Randy Kuhl (R-NY) http://twitter.com/RandyKuhl
Sen. Barack Obama (D-IL) http://twitter.com/BarackObama
Governor Arnold Schwarzenegger (R-CA) http://twitter.com/schwarzenegger
Political Parties
Liberal Democrats (UK) http://twitter.com/libdems
Massachusetts Republican Party http://twitter.com/massgop
Michigan Democratic Party http://twitter.com/michigandems
Republican National Committee http://twitter.com/RNC
Singapore Democratic Party http://twitter.com/yourSDP
PAC’s
Democratic Congressional Campaign Committee http://twitter.com/dccc
National Republican Congressional Committee http://twitter.com/NRCC
National Republican Senatorial Committee http://twitter.com/NRSC
Sports
Detroit Pistons http://twitter.com/detroitpistons
Detroit Red Wings http://twitter.com/detroitredwings
Edmonton Oilers http://twitter.com/edmontonoilers
Memphis Grizzlies http://twitter.com/memgrizz
Portland TrailBlazers http://twitter.com/pdxtrailblazers
Sand Diego Chargers http://twitter.com/chargers
Live Entertainment
Cirque du Soleil, Las Vegas www.twitter.com/cirquelasvegas
Entertainment Venues
The Roxy Theater (West Hollywood, CA) http://twitter.com/theroxy
US Grappling http://twitter.com/USGrappling
Authors/Artists/Musicians/Etc
Jason Aaaron http://twitter.com/jasonaaron
Sara Bareilles http://twitter.com/SaraBareilles
Ivan Brandon http://twitter.com/ivanbrandon
Mitch Breitweiser http://twitter.com/mbreitweiser
C.B. Cebulski http://twitter.com/CBCebulski
Chris Eliopoulos http://twitter.com/eliopoulos
Warren Ellis http://twitter.com/warrenellis
Matt Fraction http://twitter.com/mattfraction
Sean Patrick Flanery http://twitter.com/seanflanery
Seth Godin http://www.twitter.com/sethgodin Unofficial: See this post for more information.
Mike Gordon (Phish) http://www.twitter.com/mike_gordon
MC Hammer http://twitter.com/mchammer
Kristin Hersh http://twitter.com/kristinhersh
J.C. Hutchins / social media-savvy novelist: http://twitter.com/jchutchins
Ben Kweller http://www.twitter.com/benkweller
Matthew Modine http://twitter.com/matthewmodine
Todd Nauck http://twitter.com/toddnauck
David Poe http://twitter.com/poedavid
Brian Reed http://twitter.com/brianreed
REM: http://twitter.com/remhq & http://twitter.com/remroaddog
Henry Rollins http://twitter.com/henryrollins
Mark Strange http://twitter.com/markstrange
John Tesh http://twitter.com/johntesh
Thursday Band http://twitter.com/thursdayband
Mike Vallely / Professional Skateboarder http://twitter.com/MikeVallely
Ron Vitale http://twitter.com/ronvitale
Melissa Walker http://twitter.com/melissacwalker
Wil Wheaton http://twitter.com/wilw
Luke Wilson http://twitter.com/LukeWilson
[…] und innovatives Marketing-Instrument. Auf meinem englischsprachigen Blog habe ich eine Liste mit allen Corporate Twitter Accounts […]