There are a couple of videos luriking around the Internet- one is the pre-order vid that the pre-order purchasers got, and another is just a preview vid.
Sorry, I don't have links at the moment, but I am sure someone else will give you some. But I suggest maybe trying
here,
and here, as well as other major gaming websites. Of course, these are vids- but there was a CivIII 'remix' thing done at the Civ3 official site for download (not exactly the in-game music though).
hmm, I guess I did have a link afterall..
