The Occupy Oakland folks have been publishing designs for today's general strike, including this jaunty little number from R Black. Lots more to choose from, too, including the venerable IWW black cat, back from retirement and looking as spry as a kitten.
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.