"Xcode Automatic Configuration" is still down that's why Xcode 5 isn't talking with the dev center yet.
Just a note on adding devices. I added two new devices today and the hastily written web code hoses the html escaping of any special characters.
So when you add devices double check the name got entered correctly if you use anything besides numbers and letters. The edit screen for a device did let me fix the escaping errors.
Thanks for the info, and heads up