Twitter Places: One Massive Leap For Location on Twitter.

Foursquare and Gowalla integration means that you’ll be able to publish your check-ins from those services to Twitter.

http://thenextweb.com/socialmedia/2010/06/15/twitter-places-one-massive-leap-for-location-on-twitter/

Can Twitter handle being the hub of social media?

"Between buying out the best API-driven applications, implementing a host of new features and breaking news about plans for new ones, the once-ignored blue bird of happiness is truly coming into its own."

http://thenextweb.com/socialmedia/2010/06/15/can-twitter-handle-being-the-hub-of-social-media