USB hub in a Duplo brick
Miniaturization at work: "Stuffing things inside LEGO bricks" is the new "stuffing things inside of dead retro computers."
As a hand-made item at 123smile's Etsy store, it's not cheap: $50. 123Smile also offers other Lego hacks at similarly unnerving prices--check out these tiny 8GB thumbdrives.
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.