First, thanks to everyone who answers the same questions over and over. I need to do a better job of keeping up with evolving components apparently!
Below is what I ordered. I originally had no intention of overclocking or anything, but think I might now. Can't wait to see how fast she'll run.
Board
MSI K8N Neo4 Platinum nForce4 Ultra Athlon 64 Skt939 DDR ATX
CPU
AMD Athlon 64 3700+ Processor (San Diego)
Video
eVGA GeForce 7800 GT CO PCI Express 256MB GDDR3
RAM
Corsair TWINX2048-3200C2PT 2GB Kit DDR400 XMS3200
Storage
Western Digital Raptor WD740GD 74GB Serial ATA 10,000RPM
Case
Antec PERFORMANCE TX TX1050B 