He hasn't "concealed" anything that isn't already protected by existing privacy laws. Try requesting Bush's birth certificate and kindergarten records and see how far you get.
Well la-de-da, he hasn't exactly volunteered anything of any substance either.
It seems to me that President Bush made a great deal of detail about his pre-elected private life available to the public. The rest of the details were 'dug up' by a very curious press.
Now we have a President who offers absolutely no information and a press that has only very recently become uncharacteristically incurious.