Just got word from Maccell aka Italian Boy over at 3DFxzone.it that their new MesaFX 6.1: Voodoo 4/5 driver version 6.1.0.9 are out and are ready to test with Doom 3.

This distribution permits you to play Doom 3 with Voodoo 4/5 under Windows XP/2000

MesaFX 6.1: for Voodoo 4/5 v6.1.0.9 for Doom 3