I've used VIVO with my xbox and found it to be too laggy, there is a delay from a button press to the result on screen. It may have just been the software I was using but I tried a few and didn't have much sucess.
Also VIVO is not supported under Vista because nVidia won't release any drivers for it (I don't know what the ATI/AMD situation is with Vista).
Also VIVO is not supported under Vista because nVidia won't release any drivers for it (I don't know what the ATI/AMD situation is with Vista).