ThinkGeek's Portal bookends are a wonderfully geeky way to keep your books from falling off the shelf. Great for the bookish gamers in your life.
Portal Bookends (Thanks, Fipi Lele!)
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.