After much tweakage, I was able to get my 466's stable at a cool 522. I'd already partitioned my drives in preparation for this new beastie, so I installed the appropriate operating systems, and began the tests. Allow me to explain. I don't know if I'm the only person with this trouble, but it seemed to me the Abit's Plug 'N' Play was not as fine tuned as some of the other motherboards out there. Finally I contacted some friends and they suggested moving the PCI network card to the bottom most slot.
Some habits are just plain hard to break.
I like everything in a neat little bundle up top where the fans can blow across it all. After I did that everything appeared to be happy. Go try it. Once I remembered that 98's FAT32 was getting in my way, things became a bit easier. I thought I'd start with Linux first, knowing it was going to be the most difficult.