Belgian 3D printing shop i.materialise has teamed up with GrabCAD for a service called Sketch 3D. For $80, you can have your napkin doodles and other designs converted into 3D models, suitable for printing at i.materialise or any of its competitors. It's a great way to open up the possibilities for 3D printing to people who don't know how to use 3D modelling software.
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.