Japan musicians Androp built a backdrop of 250 Canon cameras and programmed all their flashes to fire off in a sort of digital stop-motion screen. Watch it, though I can't guarantee the video won't blind you and give you a seizure.
They programmed the 250 Canon cameras with Arduino, openFrameworks and Flash. There wasn't any CG used in the video, what you see is exactly what happened: cameras flashing like a mother. There's a "making of" video that gives you a behind the scenes look at what they needed to do to get it prepared and Androp has a built a website that shows you the pictures the cameras took while they shot the video (nice backs guys!) and see a custom message displayed in the lights. Check that out here.