I would never move to a new OS for at least 12 months of its hitting the store shelves; not for personal use, neither for professional (I determine the upgrade strategy for our company). The reason is 27 years in IT and the scars that come from believing manufacturers' and software companies' promises. Like "Vista has been through the most extensive beta testing of any OS". I believe the statement, but it gives me no comfort.

Anyway, why be on the leading(bleeding) edge of technology? What ounce of advantage could one possibly be seeking from entering the fray so soon?

In the case of Vista, there is additionally a major questionmark over the whole Digital Rights Management (DRM) business, how it works and what it might end up doing to one's machine and data. I have not seen an "all clear" on this anywhere outside the Microsoft publicity machinery.

No - XP Professional has to be my OS of choice for now, and for the next 12 months.