Pink Cake Box made this custom XKCD wedding cake for one of their customers in New Jersey: "The top of the cake includes cutouts of the comic characters with a red heart on a wire between them. The entire cake is covered in white fondant with black thin bands at the base of each tier. Equations inspired by this comic decorate the remaining tiers."
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.