Jamie at Intoxination has a neat new app, TweetVille.
I did some upgrades to the new Tweetville application this weekend. It now supports drilldown rooms. How this work is that you can select a root room like Congress and view everyone in Congress. If you want to limit it to one party then you can select that party in the sub-room of Congress. There is also an “All” room now that will show the tweets of everyone being followed in Tweetville.