TwitSeeker - Twitter 'twit' search engine

About TwitSeeker: "TwitSeeker is basically an alternate search engine for finding twitter.com users - 'twits' - and browsing the results all in one combined control panel. It works by using the twitter.com API, and finds twits not by what's posted in their bios but rather based on what they've been tweeting about lately. It uses a custom tag cloud generator written by the author, and was created as an experimental tool to help users quickly build up a twitter community around specific topics."