Conner, from one of my favourite sites, Slippery Brick has created this awesome Atari Hero Mod.
This is not my first console mod, but I think its the neatest. As far as I know it hasnt been done before. I wanted to be able play Atari 2600 games like you play Guitar Hero¦ With a guitar. With this mod, you just pop in your favorite 2600 cartridge, and play the game on your guitar. The screen is right in front facing you as you hold it. Instead of strumming, just use the small joystick on the upper right, or for games like Breakout use the paddle controller below the screen. The fire button is the top button on the neck of the guitar, so yes, you really hold it in guitar fashion as you play.
Head on over to Slippery Brick for full details of this cool mod.