Thanks for the input, folks...you've given me some things to think about. Develop? Hmmm...the legalities of the content worry me, of course. With good traffic, one way or the other, though, the value could increase substantially.
Thanks for the namebio.com tip, domainspade! I had just posted another thread yesterday asking if anyone knew where I could find historical domain sales info -- and this looks like just the place! It doesn't seem to have sales that go back very far, but it's a great start.