The German toy/model company Conrad ran a TV advert featuring an amazing Rube Goldberg bike lock that used motorized skateboard wheels to raise your bike several meters off the ground and up a lamp-post; here's a making-of video showing the R&D that went into this fantastic gadget.
Die Bauteile zum Fahrradschloss aus dem Conrad-TV-Spot (Thanks, Stelb, via Submitterator)
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.