Well...I got the beta invite...but... You can't sign up with Firefox, no Safari, and no IE 5.2 on a Mac... Looks like they don't want my business at all...I tried every browser I have on my PowerBook and nothing worked...not even M$'s own browser... How very 1999 of your Microsoft.
Picked the one browser I don't have...I'll wait till the real thing...it is too much work to try to manage it from a different computer.