Coming soon to a science fiction plot near you: with the right software, a plain-jane webcam can be a 3D scanner. It's a project from Qi Pan, a PhD candidate at Cambridge University Engineering Department.
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.