So it's a big crisis warranting impeachment when a President lies about screwing around and it's of no consequence when a President and his men lie and break the law in matters directly related to their public responsibilities? Personally, I think both are important but that what happens in a person's admittedly messed up personal life is of minor consequence in comparison with what is done in connection with official duties. Nixon tried to assert a form of presidential privilege, saying that any action ordered by the President could not be a crime. It was a neat theory but it doesn't hold water under our laws. Bush/Cheney have tried to assert similar privilege. I believe that it's important that we reject the notion of such an imperial presidency unless you are eager to see Obama wield that same sort of autonomous authority. I am not and I voted for him.
I also hope that Bush issues a blanket pardon. It will avoid tearing the country up trying to assign blame for things that never should have been permitted to happen and will stand as a monument to the abject moral failure of this administration. During his first campaign, Bush said he would restore honor to the White House. He has left it much more stained than he found it. Hopefully the next crowd will do better. If not, we should throw them out as well.
Interestingly, a Presidential pardon would offer no protection against civil suits. It also offers no protection against prosecution by any number of countries which allow universal jurisdiction for war crimes. FWIW, Clinton was held accountable for his mis-deeds both in civil court where he paid a lot in damages and in state court.