Digit-Life gathered some rumours regarding NVIDIA's nForce 4 but it seems that the available information varies from source to source. Some speak about a launch on October 19 while others say October 20.
A number of web resources state that nForce 4 and nForce 4 Ultra will be released first, while nForce 4 SLI will catch up later. As for other features, they name DDR400 SDRAM, 8-channel Sound Storm 7.1 and LAN.
It seems nobody still have exact information, as besides Socket 939/754 some mass media mention Socket 940. But those aware of Socket 940 don´t know about nForce 4 scaled edition for some reason.