Daniel Reese's Batman and Robin custom-painted sneakers are damned cool -- I'm especially partial to the Robins. There's a large selection of custom kicks at Brassmonki.com, on a wide variety of pop culture themes.
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.