By using AIM you can just save the conversation whenever you want. But if you use a Trillian it will log all conversations you have in the program (AIM, Yahoo, MSN, ICQ, not sure about IRC). There might be specific applications that log AIM convo's but I am not sure.
I thought it might be a Mac thing. I guess that's one aspect i can finally admit that Macs have PCs beat. Either way i got me some trillian (and unfortunalty my fears of it being named after Star Trek are now stronger than ever) and i like its so far.
Could be from HHGttG i just vaguly remember (again as much as i am ashamed to admit it) an alien race on ST that could host other organisims within it called trillians. that seems like a pretty good description of the program. But in the end who the hell cares?
If the only Chicago food you are missing is White Castle, then wow, just wow. Seriously, White Castle is the best example I can think of for a fast food joint that you either love or you hate without any middle ground.