http://beta.aol.com/projects.php?project=mymobile
First impression, a lot like Yahoo Go, but slower.. Don't let the small size of the cab file deceive you. Once you get it downloaded it starts downloading it's own resources. It appears to be a pretty big resource hog as well (uses roughly 5mb of memory).
The iteration of AIM that comes with it is ok I suppose. I haven't had a chance to fully test it but it doesn't look like anything special.