oh and b and n already took the money off my gift card...
I had the same problem with a book released 12/6/11. I went to B&N and spoke to one of the nook customer service reps and they said you have to unarchive it on your "computer" and then "archive" on the nook. It is not your "Nook", it is a problem with the downloading on their end. They are working on correcting the problem. I have the nook first edition and never had this problem. I just purchased the Nook Tablet on 11/16/11 and have had the problem with all books that I have preordered. The first time the archiving and unarchiving on the nook worked, but this one time, it did not work. If you continue to have problems, either go to B&N or call customer service, personally going to the store makes me happier.