This article talked about 5 new twitter games that help make the interface more fun and interesting. It also gives you something to besides tweet.
1) @Trivia - answer simple trivia questions
2) Snods - cops and robbers in virtual reality
3) Tweefight - go head to head against an annoying follower
4) 140 Mafia - try to take over the Twitter mafia
5) Spymaster - become a spy and join one of the best Twitter games ever