There are so many issues here that it is difficult to find a starting point.
First off, I have to ask why did you apply to West Point?
Secondly, interservice transfers upon graduation. They seem to be a viable part of the history of the service academies. They do promote cooperation and understanding. Therefore they should be endorsed. With that said, the Army is in the middle of an officer recruiting/retention crisis and I am sure that transfers is a bottom priority. In the not to distant past, a dozen or so WP graduates each year would apply and be accepted in a sister service. How many applied? We don’t know. Probably pretty good odds though. Now, due to Iraq, it is much less. By the time you graduate, will it increase back to the dozen or so? Who knows. Anytime one deals with boards, each board has specific ‘marching orders’ and historical data is of little relevance. In the past, one or two Woops each year seemed to find their way into Naval Aviation. I know a few fighter pilots. Not impossible. A viable way to realize your dream though? I doubt it. Much more direct routes.
Interservice transfer after the initial commitment. Age rears its ugly head. For Naval Aviation, the age cutoff for acceptance is 26 years old with a couple of years’ waiver for prior service. Again, a waiver. Again, a board. Who knows what each board will recommend. Air Force allows one to enter if they can graduate prior to the age of 30, I think. Will the Army release you prior to your reserve commitment? Probably not, now. Who knows in 9 years. Again, another board.
My advice would be if you really want to fly jets, an admirable goal, by the way, is to set yourself up on the most probable pipeline. Wait to hear from AFA. If it is negative, go to a good four year college, take the courses to mirror first year AFA and USNA and apply again. A one year delay is better than a five year delay.
But again, why did to waste the time to apply to USMA? I would think long and hard about an Army career totally exclusive of flying jets, before I gave up a sure thing. Make sure jets are what you really want. And then be prepared for the naysayers on this forum who will tell you that jets are not a guarantee. All I can say is that it is definitely not a guarantee if you don’t try.