These cufflinks are working lighters -- just in case you ever want to use your sleeves to ignite something. The webstore bills them as "vintage" though it's not clear to me whether they are "vintage-shaped" or, you know, old.
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.