It is said that NVIDIA will release a GeForce 6600 Go chip on February the 1st.
This will help Nvidia establish a full frontal assault on the PCI Express (PCIe) market as it will have the 6200 Go, 6600 Go and the 6800 Go shipping to manufacturers shortly if not sooner.
ATI, on the other hand, has the X300, X600, X700 and X800 on the PCIe side to fight against Nvidia.