While the MCP73 is said to be fabbed at 80nm - the same process ATI was recently claimed to be using for its RS690 Intel-oriented chipset - its successor, the MCP79, is claimed to be in line for 55nm production. Less is known about the MCP79, but it's said to contain a GeForce 8-class GPU to allow it to support DirectX 10. It too will host HDMI ports and HD resolutions of up to 1080i. It will connect to the CPU over a 1,333MHz FSB, the report claims.
On top of being coupled with IGP, it'll primarily be aimed at either notebooks or workstations, and the entire series is said to support 667MHz DDR-2. The newer of these chipsets aren't geared for release anytime soon, not even yet being officially announced. On the other hand, the MCP73 is supposedly going to ship in quantity early 2007, and the MCP79 at the end of 2007.