It shouldn't be too difficult to do. I've known people who have previously reverse-engeneered the AOL IP-encapsulation protocol, including the setup part. (It's probably become more complicated since then, and I'm not sure I could dig up the work if I tried, but still, not that hard.)

OTOH, I don't have an AOL account, and even if I did, I wouldn't piss off a huge corporation that had my contact info, my credit card, and with whom I'd signed a contract... at least not over somthing as minor as AIM users not being able to read AOL profiles.

(BTW, I'd set up my account to do AOL-over-IP (which I think they call bring-your-own-access, and then capture traffic going into their servers while looking at some profiles. Also note that the protocol is based on window-painting -- that is, every widget is described in terms of it's location, color, etc -- there isn't just a simple, meanigfull, version of the profile data sent. This means that it'll be very britile.)