Harvard's Robert Wood and colleagues created this self-folding origami: it's made out of paper edged with actuators that can be programmed to automatically (and spookily) fold the sheet into simple origami forms. They propose that this might be used to create paper cups that resize themselves depending on the amount beverage you want to put in them, but I'm betting we can come up with cooler uses than that -- use the comments and do your damnedest!
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.