I know Sub is planning on doing some music for us, but if we need extra stuff, DavidOrr has some nice stuff specifically made for projects like ours. And he's a cool guy that makes good music, so giving him some exposure would be nice.
http://www.davidorr.net/Blog/?page_id=563 (http://www.davidorr.net/Blog/?page_id=563)
This music is great; I'm very impressed. We'll have to be somewhat selective about what tracks we use, as we don't want to use so much music that it bloats the game's filesize.
One of the main reasons I posted it is because it has a 'Stingers' section which is basically ME, which is nice, because most of the RTP ones suck :)
I found a big ol' zip full of ME's a while back. By the same guy that did the 420 Pixel art icon pack. There's a couple hundred.