As previously stated, I’m using twitter now and I’m finding it very useful. However, a little app that I’ve found has increased my twitter use no end, as it integrates twitter into firefox.
Twitterfox is a Firefox extension that notifies you of your friends’ tweets and also has a small text input field to update your tweets.
In firefox it’s located in the bottom right hand side of firefox in the status bar.
Why not give it ago? You can download it from the firefox add-ons site.