Paypal has finally put a placeholder on the site - they say they're doing weekly maintenence which is, of course, horse manure. They don't do that in prime time, they do it week in and week out for two hours at midnight on a weeknight. They say the site will be back up and running at eleven-thirty, which is fifteen minutes from now.
So, if you haven't been able to make your Return To Oz payments, you'll be able to then.