Was trying to install AIM 5.9 today, but I noticed the license agreement says it includes some sort of ad-supported weather program. i don't know if it's legit, but frankly i don't wanna know. Links to AIM 5.2 and older setup files are here.
BTW, there's AIM for Linux!. Although I still think Gaim is better, sometimes I need AIM for file transfer/direct connection etc.
Anyways, also Firefox 1.0 was released. Get it there, or processor-optimized versions here.