r3vbot.pl is an IRC bot. It came about simply because I was tired of missing people in a couple of IRC channels, so I needed somebody, something, somedroid... a bot to sit in the channel and watch the comings and goings of people. It's like a nosey neighbor.
The bot also has a few other features, but they are secondary to the !seen command. If you want to check it out, go to #geekscape or #geekdrome on geekshed.net and say hi to Uatu. That's the bot. Uatu. Uatu the Watcher. ...nevermind. Anyways, !help will get you a list of commands available.