I too want the book to get here but it is the FINAL one as well. So I am sure the next book JK will write will be spellbinding and intriguing as well. You have to remember that Harry Potter has consumed her life for years I imagine a break for her will be welcomed too.
I think the door being closed is a good thing that means she is either finishing, finished or still working furiously to finish. I hope she is in the editing stage right now which she maybe just to keep us guessing