What a list! Compiled from many sources, including my own followers, this list is made of brands and companies currently on Twitter. If you know of others or want your brand added, just ask.
1 800 Got Junk
312 Dining Diva
360Fashion Network
Accenture
AccuConference
Active Network
adenin Tech
AideRSS
AIR MILES Reward Program
AL.com
American Traveler
AQA 63336
Archerfish
Arena Flowers
ATT News
Australian ISP BigPond
AutoTrader.com
Avid Technology
AWeber
Baskin Robbins
BatteryFuel
Bazaarvoice
BBC
BC Business Magazine
BCRFA
BearingPoint
besthealthmag
Better World Books
Bigelow Tea
Blinc Cosmetics
BodiBar
Boingo
Bojangles
Boloco
Bosco Chocolate Syrup
brightkit
BrightFuse.com
BT Tradespace
Build Direct
Business.com
BusinessWeek
BusinessWire
Buzzillions
Cabot Cheese
Calliopeboutique.com
Canadian Tourism Commission
Canoe
CareerBuilder.com
CBC
CenterNetworks
Chachu
Chicago Tribune
ChoiceStream
Cincom
CME Group
CNN
CNN Breaking News
Coast Hotels & Resorts
Comcast
ComputerGeeks
Constant Contact
ControlGuard
Correlix
Cristian Cafe
Cutter Consortium
Cybernomics
Delicious
Dell
Dell Canada
Dell Outlet
Deloitte Canada
Delvinia
DeskAway
Discovery Channel
DNA13
Dose
dripit
DunkinDonuts
Dyson Air Blade
Earth Institute at Columbia University
Eastbay
Eclipse Awards
EcoSearch
eGain
FAST
Fast Company
Field Dress
First Federal
FlipVideoCanada
Flying Dog Beer
Food TV Canada
Foot Solutions
FORA.tv
Ford Asia Pacific and Africa
Ford Customer Service
Ford Drive Green
Ford Drive One
Ford Mustang
Ford Trucks
ForRent.com
Forrester
Fox News
FoxNews.com
Frankentipps.de
Freewheelin Bikesharing
Fundtech
FutureTap
Gabbr
GE Healthcare
GE Reports
Geist Magazine
Georgia Straight
Globe and Mail
GM
GM Trucks
Goldensource
Graco
Grant Thornton South Africa
Grant Thornton US
Greenling Organic
Growing Bolder
GU Energy
Google
H&R Block
HarlequinBooks
Harley Davidson
Harper Collins Canada
Hello Direct
Hertz
HipHop.TV
Home Depot
HP Blades
HP News
HP Printing Group
HP Snapfish
HP Social Media
HP Store
Hubspot
Huffington Post
Humana's Innovation Center
I Love Rewards
iPhone
IBM
IBM developerWorks
indusblue
Infusionsoft
Inkfruit
Innovator Campaign (English)
Intershop
Intuit
Ipevo
iPhone
ITV
JASE Group
JBoss
Jetblue
Jewelry Television
Joost
Kijiji
Kodak
Kreative Konnect
Landor.com
Lands End
L'Express
LinkedIn
Litmos.com
Livescribe Pulse Smartpen
LocationStore
Loopt
LOWwaterkeeper
Lululemon
Lumension Security
Luxor Hotel and Casino
Lynda Learning
Macmillan Cancer Support
Magicomm
Make magazine
MarketingProfs
Marriott
MassLive.com
McMaster University Libraries
Medifast
MENG
Metro
MGM Grand Hotel and Casino
MGM Mirage
MicroStrategy
mindblossom
Mindjet
MLive.com
MostComfortableShoes
MpowerPlayer
MSC mobile
Musicnotes.com
MXTabs.net
National Association of Broadcasters/NAB Show
National Association of Realtors
Natural User Interface
Network Solutions
NewsChomper
NJ.com
NOLA.com
Nolo.com
nonlinear_creations
nopaper
Nordstrom
Nortel
North Face
Northern Light
NPR News
nuBound
NY Times
OHL
Open Book Toronto
OpenText
OpusHotel
Oracle
O'Reilly Media
Overlay.TV
Pancheros Mexican Grill
PBLoco
Pepsi
Pinstripe
PitchEngine
PlanetGreen
Playboy
Pool Cue Guru
Pop Syndicate
popchips
Popeye's Chicken
PR Newswire
Pragmatic Marketing
ProfNet
Provident
Proximic
QuickBase
Rachel Maddow
Radian6
Rain City Studios
Random House
Real Time Celebrity Sightings
Realestate.com
Red Hat
Red Hat's Gov Team
RedWire
Research In Motion
RevZilla
Ripple 6
Robert Wood Johnson Foundation
Ron's Home And Hardware
Roots
Rubbermaid
Ruche Boutique
Sacre Bleu Wine
Salesforce.com
Sandler Training
SAP
SAP Listens
SAS BI Consultant
SAS Blog Author
SAS Dummy Book Author
Sciencebase
SEGA
Semper International
Share Our Strength
Sick Kids
Sierra Trading Post
Sightix
Six Apart
SmartFinds Marketing
Sobeys
SocialText
Sodexo
Soundstreams
Southwest Airlines
Spinnakerpro
Sprint News
STA Travel
Starbucks
StreamServe
Sun Microsystems
Surety
Syracuse.com
T Mobile
Tagzania
TalkTalk
Teavana
Telstra
TerraGo
The AppGap
The Blog Studio
The Canadian Hearing Society
The Oregonian
The Sims2
The Sims3
The Washington Times
TheHandbagShop
Thomson Reuters
Thomson Reuters Careers
Tiara Hotels & Resorts
Tiger Direct
Tillamook Cheese
Times Online
Tom Bihn Bags
Tourism Mauricie
Tourism Queensland
Trader Joe's
Trade Show News
Travel Channel
Triathlete Magazine
TurboTax
TuVinhSoft
United Linen
University of Guelph
Ustream
Vancouver Sun
VerticalResponse
VIBE Magazine
Vignette
Viigo.com
Virgin
Viscape
Vornado
Wall Street Journal
War Child Canada
Web 2.0 Expo
Webcredible
Webmaster Radio
West Virginia Blazers
WestJet
Whole Foods
WikiWorldBook.com
Windows Mobile
WOMMA
Wordia
Wright Place TV
XCOM Media
YesToCarrots
Zappos
Zappos Customer Loyalty
Follow me on Twitter if you want to @andrewkinnear!
