There's been talk on several forums about how there should be such a
page, but no-one's actually written one. Until now, that is:
http://en.wikipedia.org/wiki/Wikipedia:Advice_to_AOL_users
Improvements are welcome, especially from actual AOL users. It's fairly
prominently linked to from the message shown to blocked users, so keep
that in mind when editing.
--
Ilmari Karonen