The ATI R480 normally should be available in December. It will be a native PCI Express card, for a AGP version you'll need to wait until next year. The R480 will replace the X800XT and X800XT PE and will be offered in two variations with two different clock speeds.
The X800PRO will be replaced with R430, a new chip on the block, but we suspect that this chip might be very similar to the X800XT PCIe, the R423. The only difference might be the production process as we expect to see this chip built at 110 nanometers. We still don’t know exact details but we know that this chip is real.
As for AGP users, ATI won't offer anything to replace the X800XT Press edition, X800XT and X800PRO at least for a while.
Somewhere in Q1 2005 ATI will launch a R480 bridged down to AGP with its RIALTO bridge chip.