I found this posted at WWW.ENGADGET.COM on Saturday.

"Researchers at Cambridge University have recently published a paper on their new type of WORM (write once read many) memory which is even more low powered than the ones that came before it. The new electron-only design of the memory is solution processed, making it low cost as well as it requires no lithography. The device, using ZnO semiconductor nanoparticles to inject electrons into a polymer ..."