Kindle
Check out this video of an insanely long queue at London's Heathrow Terminal 4. The YouTube user who posted it says it took him 3.5 hours to clear it. This is a line to pass through the security checkpoint while changing flights in London. I feel safer already.
Link
(Thanks, Mark!)
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.