Here’s a couple of useful(?) interesting tools for those of you who Tweet.

Twitter Grader
This measures the reach and authority of your Twitter profile, gives you a score out of 100, and a Tweet cloud.

TweetStats
This graphs your time line, Tweets per day, interface used, and Tweet density.

These days I make most of my posts via BrightKite (either via the web or my iPhone) as this updates my Twitter feed, which in turn updates my Facebook profile and this website.