http://forums.worldofwarcraft.com/thread.aspx?fn=wow-general&t=8754104&p=1&tmp=1#post8754104

We will be extending our normally scheduled maintenance tomorrow by approximately two hours beginning at 3:00 AM PDT in order to apply the latest content patch. That's right, I said it – we're patching tomorrow. Hurry, read this message before it's deleted! The truth must be told!