snipeyheadsnipe ツHighly InfluentialNice service - not as gratifying as douchenuker.com, but Twitter's API isn't busted for them: http://www.twitblock.org/
wendysparrowWendy SparrowHighly InfluentialAnyway, if you ever accidentally do that, I used http://t.co/vK6QnK0Z to find out who I'd blocked by accident.