I Want to Be the Guy is an insanely hard platformer video-game that mashes together art, bosses, and other play elements from several 8-bit console cartridges from the golden age. Here's a video of someone running the game -- mesmerising. Link (via Waxy)
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.