Kindle
Cursors That Kill is a great tee that makes it look like you're bleeding pixelated blood from wounds opened by GUI cursors that have pierced your chest.
Link
(Thanks, Mikelite!)
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.