This is your brain on Twitter

We've covered several utilities that have found fun and creative ways to analyze Twitter messages, but TweetPsych takes the cake. This one looks at your past 1,000 Twitter posts and gives you a "psychological" profile including how much you talk about yourself, work, money, and "negative emotions."

In other words, it's a great way to reinforce the fact that you're probably using Twitter for self-promotion, and/or as a way to kvetch. At least that was its analysis of my tweets.
In an introductory blog post about the tool, creator Dan Zarrella says the tool works by cross-referencing the words and phrases you use in your tweets to two different dictionaries that are sorted into various psychological profiles. It then scores you in each category based on the results of other TweetPsych users. This makes it less about psychology and more about your personal lexicon, but the results are still quite fun.L33tdawg: I'd also recommend checking out the slides from Nitesh Dhanjani's, Psychotronica presentation at HITBSecConf2009 - Dubai.