I am hearing that Revit 2012 is available now via the Autodesk Subscription centre.
However, every time I try to log into the subscription centre, internet explorer fails...
Suggesting the servers are busy....
Which would suggest that 2012 is available, online, now.
Watch this space... I will keep you posted.
I can confirm that Revit Architecture 2012 is available in New Zealand, as stated on the Revit Forum.