The Technology Studio connected a Kinect sensor/camera to a Pufferfish round video screen and created their own animated Eye of Sauron that follows you around the room.
I write books. My latest is a YA science fiction novel called Homeland (it's the sequel to Little Brother). More books: Rapture of the Nerds (a novel, with Charlie Stross); With a Little Help (short stories); and The Great Big Beautiful Tomorrow (novella and nonfic). I speak all over the place and I tweet and tumble, too.