IM Bots have caught my interest this morning as I spend a significant time IMing or connected to IM (with my new Treo). My mind is racing with the possiblities. IM would make a very nice messaging platform for standard applications. I am thinking about BAM applications with integrated notifications. Alot of this stuff is written in Perl. Either way here is some links to stuff:
MSN Bot http://www.pscode.com/vb/scripts/ShowCode.asp?txtCodeId=50887&lngWId=1
MSN Bot Service http://nice.27h.com/index_en.htm
.Net Library http://members.home.nl/b.geertsema/dotMSN/
IM Messiah Code http://www.hostultra.com/~livebots/sourcecodes.html

Tutorials and resources:
http://www.wiredbots.com/tutorial.html
http://interconnected.org/googlematic/
http://www.hypothetic.org/docs/msn/resources/projects.php
http://www.bot-depot.com/forums/

Still trying to find some sample AIM bot code for .Net.... Ahah! found it VB6 only it seems:
http://www.planet-source-code.com/vb/scripts/ShowCode.asp?txtCodeId=43691&lngWId=1
Although AIM kinda sux because people just warn the crap out of yoru bot disabling it.