yes i already have a th2go and love it so, disappointed, not for a minute :) .
i stumbled across this software version and felt it worth sharing so that others might get to experience the same with less financial outlay.
don't quote me on it,
from what i understood it sounds as thought it is in fact all rendered with the main card, and as you suggested, somehow just passed to the secondary card.
as they did mention that the secondary card could be somewhat lower end.
but the recommended bus was pci-e for bandwidth, although agp+pci may work, but might
suffer with performance.
from the little video, the results look exactly the same as the th2go.
if no one tries it out i may find the time to give it a go myself and compare, no promises, i've
learned to avoid making those :)