Wait, were any of you people who just got the second look email previously "in limbo," or had you been explicitly accepted before this? Sorry, I'm at work and can't go back through all the pages of this thread to clarify.
I didn't get a second look email, so I called the admissions office but didn't get any new information there either - just that acceptance letters have been mailed, waitlist emails have been sent, and rejection emails have been sent. She even asked me if I had actually interviewed at Duke....
In conclusion, her advice was "wait a few more days."