The ieXbeta wiki has a software and a hardware compatibility list for Windows Vista RC1. Everyone can add new software and hardware. They distinguish between “supported”, “has problems” and “heavy problems”. I think it is a great idea to use a wiki for such a purpose. If you check the change history, you’ll see that the community there is quite active. You can use these lists to verify, if your favorite tools are working with Vista. If they are not yet on the list, I’d suggest contributing your part to the project.