I just made an AIM updater for my site (I just released it tonight).
If you want to check it out go to http://www.writersrock.com/aim/
I may release the code after some testing to make sure it's working completely correctly. Also... I made a lot of changes to files like /cgi-bin/ljprotocol.pl and stuff to support the forced updates... so I'd have to go through and find everything I changed along the way.
Happy coding :)