I saw a youtube review of that, side by side with a PCIe gigabit card, and the PCIe was faster. I think a server grade NIC would be about the only sort of network card upgrade worth anything, and with more and more motherboards including not one, but 2 onboard gigabit NICs, I dont see much of a point.

One of the few things that made it different was that it was supposed to be running some sort of embedded linux, and u could attach a usb drive to it, and do file sharing while gaming, without hindering the games performance. But that was when internet speeds werent close to what we have available today, and computers themselves are so much faster that the "overhead" of onboard NICs isnt an issue. I think back when CPUs were much slower, 1% overhead was a noticable difference, but with 6 core processors becoming main stream, I see less need for dedicated processing units other than GPUs.