If you don't already know, Tweetie is one of the most popular iPhone Twitter clients out there today. It combines tons of powerful features with a killer user interface that you'd swear came from Apple. So when Loren Brichter, Tweetie's creator, started work on the next version, he was competing with his original app. To do this, Brichter totally rewrote the app from scratch, leaving behind every bit of code from version one. Then he applied all of the experience he gained from the original and created an even more powerful, feature-packed version with the same level of simplicity that made Tweetie a success. The result is Tweetie 2.