I'm not sure, but I think something's wacky when your smartphone is logged into AOL 24/7.
AOL's new AOL 3.3 for Treo 650 allows you to do just that. Eating data minutes like PacMan, the software is designed to give you AIM and email access all the time - wherever you are.
I've tried it and the IMs seem to arrive while I'm on the phone. The phone calls arrive while I'm answering email. The email arrives when I'm sending IMs.
Sometimes too much communication is not so good. :)
AOL Software is available at: http://mymobile.aol.com/portal/pda/index.html
(if you MUST!)