It runs C on an Axon microcontroller. It uses all digital servos and can lift over twice its body weight. The software (soon to be given out open source) allows for 6 synchronous degrees of motion. Future additions will include foot sensors and a remote control option.
Based on that info, and other nuggets gleaned from the Trossen Robotics forums, you might be able to have a bot of your own ready for next year. Or, better yet, put a Santa head on top of that thing and march it out in the living room on Christmas morning. Your kids are sure to have suppressed memories of it that will bubble up to the surface years and years from now causing a dramatic and crippling meltdown. Priceless. [Trossen via DIY Drones via Boing Boing]