Each of the games in the latest Humble Indie Bundle which hit a million dollars in a very short frame of time this run has had the soundtracks added to the bundle in high quality. By going to your download page, you have an option next to Platform that lets you download the soundtracks to any of the games that were in the Bundle. I highly recommend the Super Meat Boy and Jamestown OSTs, they’re fantastic.
If you haven’t picked up the Bundle, you’re missing out on an excellent platformer, a good side-scroller, a brilliant bullet hell shooter, a really neat rhythm game, Cave Story+, and a few other nice things that elude my terrible memory. There is no reason to not pick this one up, even if just for Super Meat Boy.