did something similar, with some twists http://270rule.appspot.com http://270rule.appspot.com no (!) usernames, is a bookmarklet to use on top of existing sites

did something similar, with some twists http://270rule.appspot.com http://270rule.appspot.com no (!) usernames, is a bookmarklet to use on top of existing sites, and has a feed for those sites and activities