A friend of mine did this. It's a mix of all the music we've heard to date:

http://www.youtube.com/watch?v=ELvpW46d0Aw

Enjoy.

(Edited to use the Mark 2 mix.)

I love this soundtrack so far. it sounds epic. I've caught myself humming it around the house.

It sounds much, much more like the soundtrack from Morrowind than Oblivion's... I like it.