4/12 edit: Looks like they sold out within 24 hours of being listed.
4/13 edit: Back in stock, but limited quantities.
128GB model: http://www.amazon.com/dp/B00VELD5D8
256GB model: http://www.amazon.com/dp/B00VELD92U
RamCity, the Australian retailer, has just sent their first shipment of Samsung's new M.2 PCIe SM951 SSD to Amazon warehouses in the US. Just like the older XP941, these are OEM drives, meaning Samsung provides no warranty or support directly to customers...