What it really comes down to with this board, is that everyone's mileage is varying.
I'm runnin a cusl2 with a p3700@933 at 1.8v. I tried to upgrade the mb and cpu while keeping my 98se install intact. Wasn't happening with the hardware I have. So I ended up formatting and installing WinME, since it has the proper inf files for the board. I have 3 usb devices, using a hub off the main usb ports on the mb. I did not install the other usb ports. Other cards are 3c905btx nic, Plex 12/10/32, Asus v6800 vid, Adaptec 2940 scsi, SB Live Plat and RealMagic dvd... and it almost all hums. I have a Dymo LabelWriter EL60 usb label printer that won't install. Dymo tells me they need to make new drivers for WinME... doesn't make much sense to me, but ok.
As for the overclock, I'm using 256 meg of old Micron pc100, so I'm running at 133:100:33. I'm hoping to switch to Mushy pc133... might get me up a little higher.
All in all, this was definately NOT the easiest I've upgrade done since back in the 286 days. But I have a lot of faith in Asus & Intel to work out the relatively minor problems with the 815 chipset. I expect to get this bad boy a little closer to 1ghz and not have to upgrade anything other than the vid card for a good 18 months.
I think everyone will be thrilled with this board given just a little time.