The Discovery store has these amazing wild animal hoodies (cobra, raptor, whale, shark) whose sleeves turn into huge fanged mouths when you cross your arms. I wish they didn't just have a boy modelling these -- they are definitely unisex.
Update: The shirts come from Mouthman, and they're modelled by boys and girls on the site! Thanks to the anonymous commenter who alerted us to this!
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.