Neither of them is necessary. IMAP is a server-side email system; cPanel is a common and easy-to-use Web hosting configuration control panel. They're nice, but not necessary, to have.
The baseline requirements for UBB are PHP and MySQL, which almost any Web hot provides these days. I'm currently looking into the cost for spinning off FM onto a Web host that is going to be more reliable, and also offers the kind of expansion we may need in the future.
