Pandorabots is a new site for building and hosting chat bots (HTML, not AIM) based on the Alicebot engine. They even have fee-based access to a bot. Interesting. I want to find out more about you.
The bad news: SmarterChild, one of the first instant message bot applications, is dead. The good news: ActiveBuddy, the folks that created SmarterChild, will be releasing a toolset to create new bots.