http://suicidemachine.org/
Need to disappear from Facebook or Twitter? Now you can scrub yourself from the Internet with
Web 2.0 Suicide Machine, a nifty service that purges your online presence from these all-consuming social networks. Since its Dec. 19 launch, Suicide Machine has assisted more than 1,000 virtual deaths, severing more than 80,500 friendships on Facebook and removing some 276,000 tweets from Twitter.