Master game designer (and proprietor of the excellent Manifesto Games publisher) Greg Costikyan has just launched an excellent review-per-day game-review site called Play This Thing. Greg's one of the most interesting and shrewd games people I know, and I love the writing on this site. Link (Thanks, Ellie!)
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.