for some reason this doesn't strike as a good idea... good luck finding a problem when one occurs...
I e-mail the company and asked about the amount of ram for one. more curious then anything. I'm sticking with 5 or 6 on my asrock81

they also have a GPU-Oriented x4 PCIe 4-Way Splitter http://amfeltec.com/products/flexible-x4-pci-express-4-way-splitter-gpu-oriented/
Actually I prefer the one which support the 16gpu more compact.
What is the price of that thing ?
i e-mailed for a quote. so i think the cost may be high. on that last link is the company page with link to e-mail them.