Tweetbot just updated to support Twitter's 1.1 API, and to partially support Twitter's new interface display guidelines. Come March 5, the old version of the app will stop working, and if you want to keep accessing Twitter, you'll have to do it with the new app, with it's new, more standardized look. Tweetbot won't be alone. Right now, every Twitter app designer is likely wrestling with the same problem -- how to conform to Twitter's new guidelines without losing what makes their app distinct, how to compromise without sacrificing what makes them special.