if you are looking to make the sandia cooler into a replacement for a blower style fan... then you are seriously missing the whole point of the cooler itself
the whole point to the sandia cooler is so that you wouldn't HAVE the fin array heatsink over the GPU die. the sandia cooler would BE the heatsink sitting on top of the GPU die...
and IF you are USING the sandia cooler as intended, then the exhaust air coming off the cooler would have NO cooling value to other components such as VRM or RAM or anything else that requires cooling because the exhaust air is already HOT air
not just WARM air, but actually HOT enough to burn your fingers.
i can see some type of niche application of this cooler in something like the shorty 670 card ASUS put out where the cooler is sitting directly on top of the die,
but the vibration and the gyroscopic forces of that much mass spinning acting on the PCB of an expansion card would be problematic at best. it would easily destabilize the PCIe connection and provide routine connection problems that requires reseating the card. and that's really under the best of conditions assuming everything that is claimed about the cooler works exactly as planned.
don't get me wrong. i would LOVE to be proven wrong on this cooler. however i have a feeling that the laws of physics didn't take a day off just to let this cooler slide in under the door. mass is mass, the way mass moves and forces involved in that movement as well as vibration oscillation are all very well understood. if you spin a large mass, you can expect a certain behavior from that movement. and there is really no way around that unless they are able to use exotic material to reduce the mass. yes aluminum is already pretty light. but from the vid you can see that's still a nice chunk aluminum that would have some heft to it. considering the fact that they are spinning that sucker at 2000RPM, that's just going to cause some unpleasantness in something that size.
what it comes down to is they are trying to apply the level of precision that are used in jet engine designs on a consumer product... that is simply NOT going to be cheap
and I think that's the main reason we haven't heard much more from them.