Nice list. Made me go back and check out a few games I'd never really listened to. Wizards & Warriors III was one I saw in Nintendo Power once but didn't give a second look until just now.
I'm a little sad to see that Hiroyuki Masuno's soundtrack for the first Top Gear didn't make the list. Once we had personal soundtracks on the first Xbox, I put that on for every racing game I played.
Uguu~
As obscure and unreleased as it is here in the U.S.(the creator is a Japanese doujin/indie dev, of course), ZUN - one man member of Team Shanghai Alice - is the creator of the long(really, really long)-standing 'Touhou' shmup series(Embodiment Of Scarlet Devil, Highly Responsive To Prayers, Perfect Cherry Blossom, Shoot The Bullet, etc).
Not only does he do all the elements of each game(yearly!), he also happens to make the music himself - which is so GODLIKE - that you can find lot's of lyrical remixes of his music on youtube.
But I digress; I'm just shocked at how nobody here even thought of including this music. But I still forgive y'all of not being as in to the Indie Gaming Scene as you are(Though Touhou is pretty obscure even indie-wise to me, mostly you can find fans on 4chan)
For information: go to wikia.org and search for 'Touhou'.
Second: Gamesradar would have recieved uber-indie credit for including World Of Goo's and Big Bang Mini's OSTs and they're out there on the internets for free!
heh, I like the Jet Grind Radio music, but how come I know that game as Jet Set Radio? What the hell, did they change it, or did Sega screw up again...