Here is some information about ATi his next motherboard chipsets.
First they have the RC300 for notebooks which is a single channel memory chipset for 533MHz Pentium 4 processors.
After this there is the arrive of the RS350. It will feature some improvements in memory management and it will be equiped with the a new Southbridge, the SB300. The RS350 will be available in Q1 2004.
A major change will be the RS400 which will be the first chipset to integrate a DirectX 9 graphics chip. It will support DDR400 just as DDR2-667 support and PCI Express. This chipset is expected in Q2 2004. There is also a single channel version, the RC400.
Now a little bit more about ATi his southbridges. The SB300 is in fact an updated SB200 with 2 SATA ports and 2 extra USB 2.0 ports. The SB400 will support PCI Express and another 2 additional SATA ports.