What I said, back in May last year, was what the Microsoft UK press office told me......which was:-
"Microsoft plans to release public beta versions of Windows OneCare to external audiences in the United States later this year" (2005).
The beta was duly made available at the end of November, and the beta download site clearly stated, and still does state:
"At this time, participation in the Windows OneCare Live beta is open to U.S. residents only."
That isn't to say that you can't defy Microsoft's intention, because you can. Personally I don't intend to run this software - it's a beta version (which means no Microsoft support) and the installation wizard will almost certainly require you to uninstall any existing anti-virus software before it will run. My personal view is that I would not run beta software of this nature on a computer that has any form of valuable data on it, and I certainly wouldn't uninstall AV software to make way for running a beta on such a machine.