I have a new version of TwitterMan that I posted to the AIM Gallery today. This version includes additional features like viewing your friends timeline and being notified of when your friends have posted a new status message. The flyout showing your friends timeline contains your friends icon, link back to your friends feed, status message, and of course the time the tweet was sent.
If you are new to Twitter, the first friend to add is the MarsPhoenix lander. Its fun since the lander is tweeting in the first person.