Y-Corner

If you like VGM, you might want to check out OverClocked ReMix:

http://www.ocremix.org/

OverClocked ReMix actually has been around for quite a while, but they have tons of remixed VGM from many different games. A vast majority of the VGM have been remixed into either techno, rave, jazz, rock, etc. People are continuously contributing to the site with new VGM remixes.

I've been able to find some interesting remixes over at OCR over the years.

I second yoon's <3 of OCR. Some of the music there absolutely owns, and you can find links to more great places if you look around the place. One that I like is the internet radio http://oc.ormgas.com/ocmain.php