Vista/XP run significally slower on boot camp so you better have a super fast computer to be able to run Boot Camp, Vista and your game all at once.
What are you talking about? Bootcamp isn't a virtual environment. Bootcamp allows for a hard drive to be repartitioned (or a separate drive if you have a multidrive system) so it can be assigned another OS, then the system will REBOOT into the other OS, bootcamp also provides the appropriate drivers for the hardware in the computer - it's not running within OSX, the OS running natively.
Now, if the op were using Parallels or VM Fusion then you'd have a point, but bootcamp is a totally different beast. I play various games I don't have for OSX on XP that I installed through the use of bootcamp. Plus, even with the CRAPPY video card that I have in my mac pro for gaming (ATI HD2600 until my 8800gt arrives) it gives relatively good numbers on 3DMark06 - if bootcamp were a virtual environment, 3dmark06 would end up providing terrible results.
Now, if the OP wants to play games in vista, Vinikia would need to have a machine that is capable of playing games in vista - and this has nothing to do with bootcamp, but rather the machine itself.
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