I know it's not what you're asking, but for the record you can buy memristor-memory-based microcontrollers in single quantities from Mouser today.

The reason I mention it is that memristors are being accused of being vaporware when really they're in production already.

LINK! You just can't say that and not provide a link to the catalog for us!

For anyone interested: http://en.wikipedia.org/wiki/Resistive_random-access_memory

I think this is it:

http://www.mouser.com/Search/Refine.aspx?Keyword=reram