An anonymous sticker-comedian has been decorating London tube-maps with commentary on the stations of the Central Line (that's the long red one that runs down the centre). I like this bit of transit-time humor, though the Chunnel-themed one is quite good, too.
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.