Kindle
London graffiti writer Banksy is a true stencil genius. His site -- frustrating to navigate -- is still a stunning walk through some of the finest art you'll see on the street or in a gallery.
Link
(Thanks, Sabrina!)
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.