Daniel Valdez built this steampunk Professor Xavier wheelchair (complete with bubbling cranberry and vodka tubes on the back). It's powered by an Adafruit Waveshield -- an Arduino-based audio kit -- that gives it a series of awesome SFX. It's built around a 19th century rocker, with pistons from a steelworks.
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.