I was actually wondering the same thing. I'm fourth-year Army ROTC with a May-2005 DoDMERB, and I have an interview at USUHS in a couple weeks. I received a DoDMERB application in the mail a couple weeks ago from a company called Concorde, who apparently has a contract with USUHS and the mil academies to enroll and process DoDMERB applications for prospective students.
I called Concorde, and they said I'd have to get a new DoDMERB because mine is over two years old, which is interesting because HPSP only requires a DoDMERB no more than five years old. I then called USUHS Adcom with the same question, and the rep who answered wasn't sure and told me just to wait for my interview.
So I will let you know once I figure this ordeal out in a couple weeks..