MakerBot has a delightful way of reviving the mixtape: a 3D printed MP3 player kit that looks like an old-fashioned cassette. You can either download and print the chassis yourself and assemble the device, or order the whole thing in assembled form. The Makerbot Mixtape holds 2GB, can be used as a thumb-drive, and plays directly through a headphone jack.
Read more in Music at Boing Boing
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.