La Receta de la Felicidad, a Spanish-language site, has Sandeea Cocina's great little HOWTO for baking brownies inside blown eggshells. You make a hole in the shell with a corkscrew, stand the shell up in a muffin tin with tin-foil supports, and fill the egg with brownie batter using a piping bag and bake (make sure to leave room in the egg to allow for cakeular expansion!). My mom used to make me Jello-filled hollow eggs, but this is a whole 'nother level of egg-hacking.
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.