Pictaps is a web-toy that invites you to draw a stick-figure and then creates a delightful, gigantic animation of your figure, multiplied into a cast of thousands, doing a joyful, Busby Berkeley show-number, with dancing and cavorting and so forth. Link (via Wonderland)
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.