Web 2.0 - Twitterrific

Twitterrific is a fun little application that lets you both read and publish tweets to the community website.

It updates regularly a little window on your desktop (very neatly designed and not distracting at all), so you don't have to keep going back to a browser window to check on the updates.

It is (unfortunately for the PC users) only available for Mac users.

Download it here.