This is a very impressive hack. It uses the cool Peggy that is made by Evil Mad Scientist Laboratories. It was originally created by Jay from Planet Clegg, best of all full instructions are provided so that you can make your own.
"While that’s pretty impressive, it’s also a bit invasive, since it requires rewiring the Peggy board. The new version of the project streams data to the Peggy 2 microcontroller over its TWI (also known as I2C) interface– a separate serial interface that’s available. An external Arduino board (or equivalent) sits between the host computer and the Peggy as a serial-to-TWI (I2C) converter."
