HP is working on a memrister based SSD with density of Flash and the speed of transistors http://www.technologyreview.com/featuredstory/536786/machine....
http://www.extremetech.com/extreme/207897-hp-kills-the-machi...
Sounds cool, but I'll believe it when I see it.
http://www.ufpi.br/subsiteFiles/zurita/arquivos/files/Memris...