ive heard nothing about audigy drivers on linux yet unfortunately. if u can find any old sound card, linux will likely support it though.
geforce4 support should be there already, nvidia drivers are always top-notch and quick to be released.
vmware cant realy be used for gaming unfortunately. the only real option for gaming under linux are native games (quake3, unreal tournament, tribes2, etc) or perhaps transgaming's wine implementation (
www.transgaming.com). i used it briefly for counter-strike and performance was decent but definitely slower than im accustomed to (altough i was running it on my lowend linux workstation, dual cel 500s and gf2mx). you might have more like if your system is more powerful.
my 2 cents on linux gaming, if it aint native, its not worth playing under linux unfortunately. linux is great for a tremendous amount of things but gaming support isnt there yet. quake3, ut and tribes2 are great under linux. absolutely no complaints. id recommend a nice dualboot setup between win2k/xp and 2.4 linux distro (pick one you like). reboot for games, its worth it. or u could buy a KVM switch and use two boxes (but that costs $).