"In addition to being able to run in the background, the app can use the phone’s camera for Twitpic integration, the GPS, media, touch screen, keyboard, and the graphics and storage capabilities of your device. You can read status uploads, post your own in a full screen editor, set your location, and quickly reply, retweet, favorite or email other people’s tweets.
It also supports Windows Media Player integration which lets you automatically tweet the song and artist you’re listening to." – Alan Cheslow
