SwingSwing's Tuper Tario Tros. is a mashup of Super Mario Bros. with Tetris: hitting spacebar toggles between a challenging Tetris game (don't let the falling blocks squash Mario!) and a Super Mario level that's composed of the Tetris blocks you've dropped in Tetris mode. It's funny, clever, and way fun to play.
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.