The message NomSeeker referred to has been sent to BGO's a well. I understand the frustration, but this year really is not abnormal....its a difficult job, Admissions is juggling a lot of balls trying to get the best class it can and hit the authorized class size as close as possible. They recognize there are individuals sitting on pins and needles, but this is one of those situations where personal interests take back seat to the good of the cause...actually happens a lot in the military.
Also, as an FYI -- I don't think USNA has ever characterized April 15 as a "deadline". The Admissons website says "most" will have heard, and from my observation, that is certainly true. For those that haven't heard, you will...and until you hear something you are still in the game.