Creative Labs has given some information on when to expect WinXP drivers for their audio products: Soundblaster Audigy - Middle to late October
Sound Blaster Live! 5.1 - Middle to late October
Sound Blaster Live! - Middle to late October
Sound Blaster PCI 512 - Middle to late October
Sound Blaster PCI 16 (and other Sound Blaster Products based on the Ensoniq CT5880 audio processor) - Late October to early November
All earlier products have driver support from within WinXP. Source: Creative Labs