Microsoft has made publicly available a beta pre-release its next operating system Windows Vista which was formerly known as Longhorn. It as been in development for quite sometime and still is a ways from the final release. I like the features and the security and stability of this new operating system but please do not place a beta of a new operating system on your main machine. If you wish to beta test an operating system have a separate machine that of things go wrong you are not losing critical data. I have a separate test machine myself to keep tabs on Windows Vista progress.
Will Autodesk's AutoCAD support Windows Vista...you bet we will but only after it is released and tested and we are working with Microsoft. We support so many operating system with Autodesk products from Mac, Linux, to many flavors of Windows it amazes me of the developer braintrust on operating systems and coding languages.