Viruses can be picked up from any IM, not just Triton. After all, there's the infamous imageshack/myspace virus...
Triton isn't more secure than Classic, and classic isn't more secure than Triton... its all a matter of watching out what you click.
AIM Triton sucks. It hogs resources, and isn't that great. The only thing I like is the new inteface. I just stick with AIM Classic 5.9.
I know it hogs resources, but I like it. It's impossible for me to get used to any of the classic versions. After being used to years of the slick MSN 6, 7, and WLM interface, with MsgPlus, trying out something as ugly as AIM Classic (yes, I tried it)...I just can't.
I checked in my documents > aim logs and that folder does not exist. I even searched some of my friends names in the start menu > search thing and no results.