What Should Ultimately Be Done in this Case?

The WikiLeaks story is unfolding and one PFC B. Manning has been taken into custody and now is housed apparently at Quantico, VA. This whole affair may turn out to have wide reaching detrimental consequences for the security of our forces and the security of those who are allied with us. The question will certainly come up - What should be done with the Private First Class, assuming that he is found guilty of misconduct? Treason does carry a penalty; a shall we say final penalty. After all we are not talking about some mere corporate malfeasance.