This message has just appeared over at [A href="http://acdm.turbinegames.com" target=_blank]Turbine's Dark Majesty site[/a]:
[B]Problems with Subscriptions[/b]
While doing regularly scheduled maintenance work on our billing database, an error was made that has left most people not appearing to have a subscription. This is only a temporary situation. We are working on rectifying the problem right now. We do not have an ETA on a fix, but will post one as soon as we have more information. We apologize for the inconvenience.
-The AC Team
Update: I just managed to log in, so hopefully this means that this problem is now fully fixed.