If the people making the software thought it was ready for prime time, it would be on retail shelves. Since it's not final yet, thats good enough reason for me to consider it not ready as well.

And besides, if the people didn't get a new system by next March or shell out for an OS they likely don't need, then they have a computer that will shut down every two hours. Even if they did buy the new OS, they would have to reinstall.

Windows 7 might be fun to play around and evaluate the compatibility of software, but there is no way I'd ever consider using it in production, much less have someone else I support use it.