Arduinoboy!

We absoluteley love our gameboys, the portability, the sexy design, the harsh sound and the neverending software that's still developing.
We're now building the Arduinoboy, wich let's you sync your gameboy up with midi devices and computers! We're just starting out with our arduino, a great open source platform for experimentation with almost every analog/digital signal!

check out arduinoboy :
http://code.google.com/p/arduinoboy/
Check out Arduino :
http://arduino.cc/