Currently they are shipping the RC410 IGP chipsets and by Q3 2006 they plan to introduce the RC610.
The chipset should be sampling in Q1 2006 already and we think that ATI might ad some new core that might have more things in common with Vista. After all Visa is scheduled for early Q4 2006 anyway.
We don’t know many details about this chipset but we certainly expect a new graphic core. We also know that it’s a low cost thing capable of running Intel dual core CPUs and that it's pin compatible with all ATI south bridges including SB400, SB450 upcoming SB600.