Tweet caster is now live on the marketplace. The app has made it to WP7 with all features intact. I must say, the app is really light and lightning fast. Functionality is on par with most of the twitter apps available right now, it even included Facebook integration.
Noticeably missing are push and live tile notifications. Not much of a big deal considering how light and functional the app is. Head over to the marketplace to give tweetcaster a try for FREE!