http://eshop.macsales.com/item/Other World Computing/MAU3ENVOY/ They were supposed to come out in April or earlier. OWC waited, waited now that their Aura Pro blades are outdated hardware, they finally released it. A bit of a mismatched concept: Old Airs don't have USB3.0, new ones have different blades. The only possible buyers I see now are people who have spare blades from OWC upgrades to 2010/2011 Airs. But is it worth $50 to make your old 64/128GB blade functional? A 64GB SD card is cheaper and more portable.