I looked for DDR 2 memory modules at Pricewatch.com, Danawa.co.kr and Enuri.com. They are price comparison sites.
256MB DDR-II module for nearly US$90 was the lowest price I could find. That's almost the price of 512MB Registered ECC memory module I use for Xeon 533MHz FSB systems.
DDR 2 memory availability in July 2004 is like the DDR I memory availability in late 2000. In 2001, Crucial, a Micron division, began to lower the price of 256MB DDR PC2100 modules down to US$29 per piece.
PCI Express devices are not very easy to find. The first motherboard chipset to have 4 SATA channels in addition to the usual 2 PATA channels is the 915/925 series. It wil take some time for component manufacturers like Samsung, Hitachi, Fujitsu, LG, Micron, Seagate, BTC, and so on to make better use of the new features.
Prescott processor itself is undergoing some transformation. Anandtech also recommends waiting for the next stepping.
Two motherboards have at least 8 S-ATA, IEEE 1394b, 2 10/100/1000Mbps LAN, 54Mbps wireless in addition to the standard 925X features. I'd like to have one of the two when DDR-II modules become as affordable as DDR-I. Zalman has a good cooler for Prescotts, the new all-copper 7000B with Fan-mate 2. I have a 7000 AlCu on a Northwood 2.4B, and two other Zalman CPU coolers.