Tihk sells a tiny, easily concealed handcuff key for "everyday carry," and intended for "law enforcement, military, and security professionals...[to avoid] being restrained with their own cuffs, captured person release and evading capture themselves." $13 for a two-pack.
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.