This has nothing to do with US citizens. Therefore, there are no Constitutional safeguards that are being violated.
There have been lots of reasons in the last 75 years to fear for the loss of Constitutional rights. This just doesn't happen to be one of them.
This is a big deal. It is an cynical and unprecidented attack on the constitution. Conservatives do their cause an injustice when they roll over for any power grab by politicians who call themselves conservative. Always look to your principles. One of the highest goals a conservative in this country can have is to conserve the US Constitution. The attack is not always from the left flank.
As I've said before, I think the point is moot. Bin Laden will not surrender. You won't see the army carting him back alive for trial -- either an open, legal trial, or a secret and unconstitutional military one. We have nothing to gain, but we have the Constitution to lose.