This service, they don't even call it beta, doesn't work most of the time. Anytime I try to sign in, it is unavailable. Redirections go dead, browser shows error page and dies. Real crappy for a big company like Microsoft. Our company does a much better job with such low resources than MS. I agree that it might be scalability problems, but wtf, call it beta, do limited beta, stop accepting registrations. But don't accept registration and make the user go to a dead page. That's sheer disrespect from an arrogant large corporation to the users.
I've been working on getting e-mails delivered to hotmail from our corporate mail server. That's for another post. But preliminary investigation indicates that almost everyone is facing this problem. Seems like bozos over there can't interpret SPF records. Having valid spf record makes your mail to get junked while not having spf record at all yields better results. Typical of microsoft.