Ooh! Nice idea.
Looks nice, like the idea of the PCIe interface. I would like to see this tech trickle down into a PCIe card that can plug into ordinary PCs like the old GigaByte i-RAM PCI cards, without the PC needing a whole new filesystem to take advantage of it, but servers sound the right place to start for now. The TMS RamSan devices are great but very expensive.
On a technically quibbling note, surely if the appliance uses GbE or Infiniband then it's a NAS rather than SAN device?