Hey Ben, do you think you could do something with this? http://123d.circuits.io/circuits/284159-bluegamer
It's a game console pcb with attachments for rca and i2c input. There are three ATmega328p's: 1 for video, 1 for input, and one main "cpu" for everything else, include an extra 32k eeprom and an sd card connection section. The first two are connected to the main board by 4 data pins each, creating 4-bit communication between them.
I was hoping you could program each one and make some sort of game console. Do you think you could do it, or at least try it? The board is 8cm x 10cm.