I might not have been as blown away by Bastion as some people, but I did love the music. That music is now available to download and enjoy at your leisure.
The official soundtrack is available on the Supergiant Games website, so head on over there to get some really lovely tunes. For ten dollars, you'll get all the tracks from the game, plus a new narrated intro and a bonus track, "The Pantheon (Ain’t Gonna Catch You)."
Sounds like a good deal to me!