I was looking for the same info (just for AOL). I called AOL's 'mac tech support queue' number (888.265.8007) To ask for the smtp, pop etc. First, she asked if I was using outlook. (I'm not) Then proceeded to tell me that they don't have an smtp address.

She didnt offer any other advice, was kinda snobby, and I was on hold for like 10 minutes so I didn't stick around...not like I expected much out of aol anyway.

Let me know if you figure this out...from what I understand aol is not compatible with the mail application.