The Pope is now on Twitter
Twitter launches its own URL shortener
Twitter's new "Follow" button simplifies tracking
Twitter cuts a $40 million check to buy TweetDeck
Charlie Sheen joins Twitter. Winning!
New gadget lets your dog Tweet. Seriously.
Only 4% of adults use location-based services
Twitter to become infected with more ads
Twitter on pace to reach…200 million users by 2011
Twitter now runs a billion searches every day
Twitter to begin letting people pay for "promoted" account
Twitter eclipses 20 billion tweets
ACLU pledges to help keep Twitter users anonymous
Dalai Lama to hold Twitter chat today
Twitter joke lands man with £1,000 fine