As of today, here's the deal.
The President can designate you (or anyone else) as an enemy combatant. If so, you can be held without trial indefinitely, without charges. If you are at some point tried in a military court (so you can be executed for war crimes), you won't be shown the evidence against you, you will have a court-appointed lawyer, and you can't appeal. Hearsay can be used as testimony, as can information beaten out of witnesses. Speaking of that, the President can decide what does and what does not constitute "torture" of you under rules that will not be disclosed to the public.
Basically, you're fucked.
Welcome to the world, baby.
UPDATE: Shocker - Fox News is already lying about the Military Commissions Act.