Chris Sims, Laura Hudson and Colleen Coover have executed as series of "Great Comics That Never Happened" for Comics Alliance, and they're fabulous. Exhibits A and B: Great Comics that Never Happened: Batman and Jay-Z Solve 99 Problems! (Chris Sims), and Great Comics That Never Happened #21: Jack Kirby's 'My Little Pony' (also Chris Sims) (Hudson has a good line on Christmas-themed work).
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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.