The superb iPhone (and more recently Mac) Twitter client has seen a 2.0 release late this week. Version 2 adds support for multiple twitter accounts, a gorgeous UI, simple gestures for refreshing tweets, application persistence (get a call you can relaunch Tweetie 2 and it takes you back to where you were, not just the homescreen every time) and much more.

Tweetie 2 is a $2.99USD application, there is no upgrade pricing for previous Tweetie users. That being said, it is worth every penny and a significant update. Read more at the Tweetie site: http://www.atebits.com/tweetie-iphone/