 A guy build a moving stargate out of legos and has a bunch of photos to show for it. Unfortinately there doesn't seem to be a video of the starget in action. However, he has the starget hooked up to a RCX treadmill (whatever that is) which spins the stargate around for a random number of seconds and repeats that seven times. The chevrons (the little red things on the gate) have LED lego blocks in them which light up as well. Legos seem to be a pretty way to fast prototype things based on some of the other projects I've seen done with them.
Check out all of the photos of this lego stargate for yourself. | 
