Design Heure's lovely lamps include simple slide projectors that allow them to bounce the image of your choice off a nearby wall. They also do some handsome projection clocks. I love the all-analog technology here -- just some mirrors, lenses and transparencies. Link (Thanks, Herveline!)
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.