Adding to the pile of Extra Future 6-hour projects, I present to you: Tybor, a Markov chat bot. He is a chat bot based on the Hailo perl package, with a custom retro-styled HTML5/CSS3 interface written by me.
He also has a jabber account, which Google Talk/Google Apps users can talk to by adding the user tybor at extrafuture dot com to their contact list.