I don't recall where I saw it but the products are already in production. It's a standard DIMM module but it has a NAND chip mounted to the DIMM as well. I seem to recall that the NAND module was significantly larger such that you only needed one NAND chip for every 8 RAM chips. Thus a standard DIMM with 8 chips had a single NAND chips mounted to the back (or in the middle if thickness is a concern) of the DIMM.
It's pretty neat technology, though I wonder about the overhead of copying into and out of the NAND because there is still a difference in latency. It was my understanding that there are several different nonvolitle versions of RAM coming that have similar performance to standard RAM. I believe the ferrous magnetic stuff is already in limited production.