The beta looks pretty good and works pretty well. However, I have not be able to access a MM Public Calendar from any other Calendar (Google, Windows Live, Outlook, etc...). Anyone else able to get this to work?
From the MM Calendar Beta Known Issues, it says you should be able to Share as Public (read-only).....
"Sharing private calendars can only be done with other participants in the MobileMe Calendar Beta. Public (read-only) sharing will work with non-Mobileme members and people outside the beta."