I’'m working on an open source project called Habotat (pronounced like habitat[/i]). Habotat is basically an IM bot server. It uses Smack to connect to GoogleTalk but it also supports AIM and YIM through other libraries. The project homepage is here: http://www.hyperrealm.com/main.php?s=habotat
The project is not yet ready for public consumption (version 0.4 is very rough and I don’‘t recommend downloading it). But I will have a beta version out soon. In the meantime, I’'d be interested in hearing any feedback. And I could definitely use some help if anyone is interested in contributing to the project.