Twitbin - use Twitter in a Firefox sidebar
Tools for Twitter are cropping up all over the place to help you get your Twitter
Once you download the extension, the Twitbin icon shows up in your browser. When you click on it, Twitbin opens as a sidebar and displays a toolbar. The gear icon allows you to set your preferences, either public or friend streams, and auto refresh settings.
The home icon lets you log into Twitter and once you do that, Twitbin streams your tweets. Sweet. When you close Twitbin, it stops gathering your tweets, and when you reopen, it will restart the tweet stream.
Twitbin works on Windows and Mac OS X, and possibly Linux as well (anyone test it out yet?). Stay tuned for a comprehensive "All things Twitter" post coming soon.