This glass knife was hand-knapped by Mike Cook of Portland, Michigan out of fiber optic glass. Magnetometer-invisible and broadband; can't hardly ask for a better tool!
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.