PC Perspective posted an article on the AMD 770 Chipset

AMD has a small window of opportunity to bundle a lot of motherboard chipsets with their processors before other competitive parts are released for both AMD and Intel processors. Intel is working on a PCI-E 2.0 successor to the P35 and should have it ready in time for release with the upcoming 1600 MHz FSB processors, and NVIDIA will undoubtedly have products supporting both Intel and AMD in the February/March timeframe. It is probably already too late for AMD to make a major push, or to convince other manufacturers to produce a more feature-rich and budget-enthusiast aimed board.

The Puzzling Existence of the AMD 770 Chipset