Definitely worth it to those interested in having an idea of how the OS will look, operate, and the new presentation of information.
There is a trial 'beta' version of Micro Trends internet security suite (recommended on the Vista pages) that has been built for Vista for those who have issues with their current security programs (it works well, although the trial period ends on October 31, 2006 - or at least it does on my machine which was installed last week).
Although most hardware manufacturers have not provided any beta "Vista" drivers, the OS has some reasonable 'vanilla' drivers that will allow many people to try out the OS along with IE7, Windows Mail, WMP11.
Thanks again, Zoomba.