DailyTech has some more info about NVIDIA's upcoming nForce 600 series chipsets:
NVIDIA is set to release its upcoming nForce 600 series of chipsets in the first half of November. DailyTech has come across more details of the upcoming chipsets including the nForce 680i SLI, 650i SLI and 650i Ultra—all for Intel’s land-grid-array 775 socket. At the top of the nForce 600 chain is the nForce 680i SLI MCP. This chipset will be replacing the limited availability nForce 590 SLI Intel Edition that was announced last June. The nForce 590 SLI Intel Edition had problems with overclocking the front-side bus past Intel’s rated 1066 MHz..