Twitterlex widget... Check up on what your Twitter friends are doing right now, and while you're at it, make sure they know too.
You'll need a free twitter.com account though! Updates once a minute when visible, and only once every five minutes in the background, putting out a Growl notification if anyone has updated.
What's new in Twitterlex
Twitter is standardising on 140 character length tweets, so changed to reflect that
Tweet button now says \'Tweet'
Status update text box now marginally bigger, marginally.