This is an older version of AIM. Unlike the current version of Mobile AIM, this does not put as much strain on your phones memory so its less of a headache to use. However, unlike the current version this aim does not alert you as to when you get a message so I guess that's a drawback in a way. Also when you install it on your phone if you're wondering how to sign on just send a message and the program will tell you to sign in. I'm not exactly sure how I came across this but here it is:
This is an EXE file so you have to install it from your computer obviously, it's rar'ed so you will need zip or winrar to unpack it -
aim.rar - 5.63MB