I'd say Matt Yglesias  sums it up best:
It'll be a real shame if Dana Priest -- one of the best reporters out there -- winds up needing to do hard time over this. But with my partisan hat on, the reality is that the gambit in question is bound to backfire. The political subtext of the Plame Case was that it shed light on the broader issue of manipulation of intelligence. The only broader issue illuminated by this proposed investigation is the existence of a network of illegal, secret torture facilities.