App Advice notes that Tweetie 2 has disappeared from the App Store, suggesting that a release of the official Twitter iPhone application may be right around the corner.
Twitter last month acquired Tweetie and has been planning to rebrand it as the company's official Twitter application. At the time of its acquisition, the application was updated with an easter egg announcing the forthcoming change, and its App Store description saw the addition of a note regarding its future.
Tweetie will soon be Twitter for iPhone - and it will be free! So you might want to hold off on buying Tweetie 2 for now - look for the update soon!
With Tweetie 2's disappearance from the App Store, it appears that the change may be coming as soon as later today.