Karl has blown my mind every time we've had a conversation, ever since I first met him in a writers' workshop at 16. He was the first person to tell me about fractals, chaos, Unix, gopher, and evolutionary psychology. His interview roams over numerous themes and subjects and provides some key insights into how he accomplishes his amazing, wildly imaginative world-building. He even talks about what it was like growing up as a Mennonite tech-geek. Link (Thanks, Bazooka Joe!)
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.