I've been playing with Arduino's for a while and finally started to get somewhere with my project. So here's a small video of the base of my robot in action. It's a Arduino Duemilanove with a motorshield from Adafruit used to power 4 dc motors on a chassi from Seeedstudio. So the next step will be to add a servo and a some way to measure range so that it can roam the apartment without hitting any walls.