For those who want the power of a Pentium4 processor but want to still use their old RAM, there is the i845 chipset. t-break has posted a review of the Shuttle AB30R Motherboard that just happens to use that chipset. here's a snip:

"The Pentium 4 is still evolving. Intel realized that RDRAM wasn't really going mainstream and thus decided to introduce an SDRAM based chipset in the for of 845. We got one such motherboard from Shuttle modeled as AB30. If you remember, the Shuttle AK31 won an Editor's Choice award from us because of it's performance, stability and overclocking. Can Shuttle pull it off again?"