ThinkGeek's done a Tenth Doctor "costume tee" that's pretty great. I'm assuming that all that detail is silk-screened with fool-the-eye shadows, and not actual additional material sewn onto the shirt's front (though that would be megaboss and someone should totally make it).
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.