After two trips to Fry's and about $500 kwc.org is back up and running. I'm now on an Althon XP 2600 platform. I didn't want to take the time to figure out what exactly was busted to hell on the old platform (my hunch was either the memory or the memory controller on the motherboard) and I wanted to get things up again quickly, so I chose a mid-range upgrade that will probably be barely noticeable. The full list of improvements is:
- Althon XP 2600 (was Althon 1700)
- Gigabyte KT600 mobo
- 1GB of DDR PC3200 (DDR400) memory (was 768 PC2100)
- GeForce FX 5200 (I didn't want to do this, but the new board required AGP 4x/8x, and I figured at this point the money's already lost)

Windows is now telling me that I have to reactivate it. That's sad.