"This table has a lap-top computer connected to a screen projector mounted on the ceiling. It projects the currently visible parts of the map onto the tabletop. The referee can control which parts are visible via the laptop."
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.