Coppermine using the .25 micron process is shipping next month on a PC100 BX motherboard. The 820 chipset is still on schedule for a September release. Rambus Christmas as Unclewest likes to call it.
Using the MTH bridge, the 820 Camino chipset will support PC133 according to the conference call. However, the ONLY reason to use PC133 instead of Rdram is availability and NOT performance or anything else. Intel was still concerned there won't be enough production in place by the 3rd quarter. That will change quickly.
In November, the PIII 600 using the .18 micron process will ship. This chip will only be supported on the 820 and 840 chipsets. Speaking of which, the 840 Carmel chipset will be the only chipset in September to have PC800 Rdram until sufficient quanities are manufactured for both. The 820 will start out using PC600 and PC700 Rdram.