Kindle
Bonusfive sez, "A company is providing services to etch up to 196,000 pages (nano microscope retrieval) onto a 2 inch square of nickel for archival purposes, which should last 1,000 years and survive heat up to 500 degrees C. They can also cram up to 18,000 pages for optical microscope retrieval."
Link
(Thanks, Bonusfive!)
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.