With an hour or two of his arrest Pvt Manning was assigned an experienced military defense lawyer, paid for by the military. He can also hire civilian lawyers and certainly has given the six figures that have been donated to his legal defense fund. He would be allowed daily contact with his attorneys.
Note that his attorneys had not played the 'torture card'.
His confinement situation is no different than that experienced by any solider accused of a serious crime.
He will be tried before a jury of his military peers.
If he really did release this document collection to civilians then he is in no way a 'whistle blower'.