Interesting to say the least. But considering that AMD and nVidia can barely get multiple of their own GPUs talking together (at least for now) I am extremely spectical this technology. On the other hand if it does work...

I wonder if you have an AMD and a nVidia how are you going to have drivers for both cards installed at the same time? Do you rely soley on Lucid's drivers?

Looking forward to see how this pans out.

It seems as if its only for Windows 7, so two different graphics cards with support drivers (ATI and Nvidia) seems doable to me.

The only drawback (in the short term) is going to be the price of the hardware.