NVIDIA Powerwall

I’m using a Quadro FX 3000 to drive a pair of edge-blended side-by-side projectors. I’ve been handling the edge blend in software. However, I recently noticed this page

It indicates that functionality will be made available so that applications may take advantage of edge blending transparently. It says this will be enabled in the next major release of the driver.

However, I see no date on this. Has this driver release been made? If not, when? If so, how is it enabled and configured?