Ummm, let me see.
I can dump AOLServer and use the Zope internal web server, then I can dump Oracle/Postgres and use thier internal DB, all of course much more scalable in the process. And, still not have the features I can get with OpenACS, FOR FREE.
Sounds like a great deal, I think I will convert all my clients starting now. Since this is a complete flame bait I won't even bother with more of a reply.