https://discussions.apple.com/message/19198856?tstart=0#19198856?tstart=0
A number of people are reporting seeing the error:
Your account is temporarily unavailable.
The Store is unable to access your account information. You may continue to browse the Store. Please try again in a few minutes.
I'm having the same issue on my MacBook Pro, on my iPad, and my iPhone when I attempt to backup, restore, or download apps.
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Ken & Kiyomi: A Boy and his Dog
Minding the Lathe of Dreams
Wilson Hines
August 7, 2012 at 10:03 pm
Oh, but no!
Ken Foreman
August 7, 2012 at 10:04 pm
Looks like it's intentional. Apple has frozen iCloud accounts this evening:
http://www.wired.com/gadgetlab/2012/08/apple-icloud-password-freeze/
http://www.theverge.com/2012/8/7/3226893/apple-icloud-password-freeze-24-hours
Wilson Hines
August 7, 2012 at 10:06 pm
I can see everything on my stuff. iCloud and all.
Ken Foreman
August 7, 2012 at 10:07 pm
I can see my stuff, but I can't download new stuff, making backups/restores, or buy new stuff.
Vladimir Sizikov
August 8, 2012 at 10:39 am
Same here, can see everything, including my account details. But cannot download/purchase anything. For hours and hours.