Sounds interesting, but isn't that really overkill? I know you don't need the SLI graphics cards in the above setup, but really -- dual dual-cores? What are you going to be doing with this thing?
Yeah there is for both Xeon and Opteron. I would just buy a prebuilt rack server based core 2 xeon's. Should be alot cheaper and faster then the opteron based system (dual x2's are not supported yet)