[Tweetie](http://www.atebits.com/tweetie-iphone/) on the iPhone and Mac OS X is one of our favorite Twitter client, the iPhone version is available on the App Store for US$2.99. Many has considered it the best Twitter client yet. But Tweetie will soon no longer be available. Well, Twitter the company has purchased the Tweetie app, and will soon renamed it simply as Twitter for iPhone. And the good news is it will be free.
Twitter has released official client for Blackberry beginning of April and the official Twitter app for [Android is released on 30 April](http://blog.twitter.com/2010/04/twitter-for-android-robots-like-to.html). So expect the rebranded Tweetie within days if not sooner.