Here is the article from the USAFA website for convenience:
http://www.usafa.af.mil/News/Article-Display/Article/1210916/cadets-to-perform-on-americas-got-talent/
It only took me a day or two to get my immunizations approved... I would give them a call about it. Same thing happened for my optical declaration and it turned out that they never received my paperwork. It's possible that they received your immunization record but misplaced it.
The status should change about 10 or 12 days after they received your information. Times may vary but I believe that's the general amount of time it should take. DODMERB will send you an email when the status changes.