from garnering too much of the marketshare when it comes to Twitter users.
I think this goes beyond Twitter users. Twitter probably wants it because Tweetdeck has become to social media what Netscape Navigator was to the Internet. Or at least that is what they intend. Tweetdeck is the front door to many other social media services, including Facebook. The one ring and all that. :P
TweetDeck is your personal real-time browser, connecting you with your contacts across Twitter, Facebook, MySpace, LinkedIn, Foursquare, Google Buzz and more.