It's not raid configured. that would require 2x RevoDrives. You might see in the specs it says something about 2x, but that's to tell that it uses 2 pci-e lanes.
I wound't get a PCI SSD because of the price. It's too early for that. The price is gonna drop as they become more common.
Just like SSD's. They are actually affordable now
I rather get 2 Evo 840 in raid0. For more than half the price you get a little more than double capacity. Sure it's still not as fast, but it's close enough.