I regret to inform you that according to http://usmilitary.about.com/od/joiningthemilitary/l/blpilotage.htm, you are too old.
I only checked for the five services, not for the different National Guard branches, so check those out.
The good news? I believe that you can still become a civilian pilot. If flying is really what you want to do, if you have the financial ability to do so, you can get your ATC and get hired by an airline. If you want to join the military anyways, check the requirements for regular personnel. I think that you can still join, at least under certain exceptions.