Tony Fox NYC released an entire album of game-themed techno at CGE2K2. Great stuff that you should check out. There's also a band named Pus who I think are Swedish that do all of their music using only a GameBoy, from what I've heard. I've heard one of their albums, and it was pretty cool. There's also a band called Game Over that do Nintendo metal songs. www.nintendometal.com for more. VNV Nation or Welle did a song a while back that was video game-themed. I can't think of the name of it offhand though. Oh, and this isn't major artist stuff, but check out
www.gamingfm.com for straight-up video game tunes.