MAKE subscriber James wrote in to share the Hackvision, an open-source video game system based around the Arduino platform. The joypad-shaped circuit board plugs directly into your TV, and provides everything you need to get hacking on your own games. The whole project is open source, and all the source code/schematics/board designs are available at the project website. Looks fun!
Hackvision, an open-source video game system