Akira Yamaoka, of Silent Hill and Bemani fame, worked together with a bunch of video game composers to create a charity album. It's finally been released on iTunes and all proceeds will go to the Japanese Red Cross in order to aid victims of the earthquake and tsunami, so be sure to pick it up!
And here's some info + a video from album director Yamaoka about it:
Gamespot has uploaded a few of the songs to sample:
Not only is it for a good cause, but it's fantastic listening too (how could it not be, with that talent behind it?).