I finally figured out how to move on in Elder Scrolls IV: Oblivion!
Apparently I missed one tiny little thing, and that was the hold-up. I completed a quest that was supposed to happen after that tiny little thing, so it never asked me for it. Oh well, at least I did get around to powering up my character to what is probably the upper limit. Sure it was like an extra 20 or 30 hours, but at least it was a fun game. I can't wait to finish the game!!