A phantom entry in the App Store (link) has revealed that the official Twitter app for iPhone is on the verge of going live. While the entry still claims that the app isn't available in the US or any other store, it does reveal that the app may largely be a rebadge of the recently acquired Tweetie. It so far shows as version 3.0 and even uses the Tweetie 2 icon, although the latter is likely to change.
