Mikhailtech has just posted a review of some Micron PC2100 DDR SDRAM. here's a snip:
"With the maturation of the DDR chipset, newer memory is becoming more and more efficient and the gains over PC133 are becoming apparent as ever. Price used to be a major factor, but now that SDRAM and DDR are close in cost, there's not need to go for the slower stuff. We all know Crucial memory rocks, but that's not the point. Today we're taking a look at a "major brand" stick of PC2100 made with Micron chips."