Kindle
Streamer is a swarming MP3 streamer. Every listener to a Streamer Internet radio station relays for other users, so that you can never run out of bandwidth -- think of Onion Networks' and Blue Falcon Networks' technology, except that this is free and GPLed. I wish that the CBC would adopt this for their Internet radio streams, which are 99 percent busied-out and have a lot of rebuffering problems. I've got tons of upstream bandwidth in San Francisco, so I could handily relay CBC Toronto for other Bay Areans who wanted to listen to it, giving everyone a faster connection and saving money for CBC besides.
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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.