TweepyDeck is currently an experimental PyGtk client for Twitter.
To run it you'll just need to execute the
Why are you asking for my password?
I'm not particularly sold on using OAuth with Twitter, while it is convenient when you're working with web applications it's unpleasant (in my opinion) when building a desktop application.
Yes, TweepyDeck does prompt for your password but the application is using SSL for every API call that uses your password.