Well, I went out and bought a $30 USB 2.0 PCI card from staples and that fixed up my usb problems. The onboard ones obviously still don't work but I just went into the device manager and disabled the usb host controllers. Maybe someday SiS will come out with a patch to fix them. I do have to say tho....that it is really really weird how they worked for a while...i installed xp about a month after it came out...and then just now stopped working. Oh well I guess. But there ya go. Hope this helps you guys out.
Take care and good luck ;-)