AnandTech have scooped SIS's latest Roadmap! Here's a byte.

SiS' P4 chipset roadmap is very similar to Intel's in that none of their flagship chipsets this year will feature AGP support; SiS is moving very aggressively to PCI Express for graphics. This leaves VIA as the only chipset vendor providing a dual AGP/PCI Express solution for the Pentium 4.