The good peeps over at NTCompatible has got there mits on some new 3dfx drivers and tools for XP!
Windows2000 Voodoo Banshee Drivers Sept 27, 2001 983 KB
Windows2000/XP Obsidian2 S/X Series Drivers Sept 27, 2001 1,825 KB
Windows2000/XP Canopus Pure3D Drivers Sept 27, 2001 328 KB
Windows2000/XP Canopus Pure3D II Drivers Sept 27, 2001 702 KB
How to Tweak Voodoo1 or 2 in Windows2000/XP Sept 27, 2001 116 KB
Windows2000/XP Voodoo Rush Drivers Sept 27, 2001 172 KB
Windows2000/XP Voodoo Drivers Sept 27, 2001 660 KB
Windows2000/XP Voodoo2 Drivers Sept 27, 2001 1,050 KB