Daww, that was nice of him: Randall Monroe's made me the punchline of another XKCD!
Update: Hey, this is from 2008! I missed it then. No matter -- it was funny then, it's funny now.
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.