I have this exact same question. (Google to the rescue: "Syba Dual Slot")
Scenario: Win7x64 - Running both a Corsair Force 3 240GB & a Crucial M4 128GB in a non-RAID configuration. I'd imagine that it shouldn't "require" you to run a RAID config considering it probably takes a manual setup in your BIOS for this setup?.
I have one on order, and will update this post within the next week or two.
I'll be installing this deal into my PCI Express x16 slot, running at x8 on my Gigabyte GA-MA790GP-UD4H.