This'll be my last post in this thread, but I'll just reiterate that people tend to obstruct justice for a reason. Whether enough evidence can be compiled to indict may be another matter, but people generally don't, I wouldn't think, lie and hide the truth unless the truth would be damaging. I'm of the opinion that Rove and Libby did, but that's only based upon what I've been able to piece together from various news reports.
Of course, it is certainly within the realm of possibility that nobody perjured himself, nobody lied, and the events of the past couple of years were more of a mutual misunderstanding than anything else. As an American, that would be my best-case scenario.