smichaelsUSNA,
I was also medically disqualified for a shellfish allergy, in late July. My Admissions Officer at West Point submitted a Medical Waiver request on my behalf on August 15 and I am still waiting. When I spoke with my Admissions Officer he told me that traditionally Shellfish allergies were difficult to come by. He explained to me that if you carried an epi-pen for the allergy, which I don't, there is no chance of receiving a waiver.
Since then I have been in constant contact with my minority outreach officer, I am hispanic, at West Point and she has been more than helpful. She expressed to me that my file was extremely competitive for admissions and that her supervisor and herself were doing everything they could to make it happen.
Best advice I have for you is to speak with your admissions officer at USNA, make sure they know you are interested.
Hope this helps, let me know if you hear anything.