According to the current schedule, the Hybrid SLI driver for MPC78 chipset has entered the RC1 A01 beta stage. It all went well and this happened a few days ago.
The next step is the WHQL candidate that is expected just after CES or around January 10th, while the production driver is expected around the 20th, or some 10 days later.
Nvidia will be ready with the final driver, the one that will have support for both HD DVD and Blu-Ray in the last days of January.
Nvidia hopes to get a lot of OEM customers with this Hybrid SLI concept and boost its market presence there. Nvidia has to come back with chipsets, as 2007 was the worst year for Nvidia's chipset division in a while.