Well, I must be living right.
I pulled out my trusty KK266+ and put the A7V333 into my tower, along with the 1x512Mb Corsair PC2700 stick of memory. I set all the jumpers to my "best guess" settings (man there are a lot of them) and powered it up. The voice messages are totally incomprenensible through the little "squeaker speaker" built into the case.
Much to my surprise Windows XP Pro Corporate fired right up, went through some self-adjusting for the new hardware and works great. I'm so happy I don't have to reinstall everything. There does not appear to be any artifacts from the old hardware. Gotta love Win XP!
This motherboard is a screamer. Just to be safe, I initially started up with the default (ultra-conservative) memory settings and 10x133 on the CPU. I then slowly worked everything up to the most aggressive memory timings across the board and a FSB or 170 Mhz. This yielded Sandra memory bandwidth results in the 2500/2400 range. Wow! At FSB settings above 170 Mhz, Prime95 Torture ran fine, but 3DMK2K1 started crashing. That was all last night and I have a lot more "massaging" to do the next few days.
In typical ASUS fashion, the new thermal diode monitoring circuitry is not as responsive as using one of my SMBus thermal diode monitoring modules and appears to read about 5C high. For the moment, I can live with that, but I will be looking at getting that feature optimized, or defeated so I can use one of my modules.
Aside from that minor detail, I am very pleased with this, my first ASUS motherboard. I don't believe I could have asked for a more enjoyable transition from my old motherboard.