DAN RIEHL says that media reports of U.S. nuclear plans against Iran are highly exaggerated: "There's far too much in the Hersh piece to simply jump to the headline or conclusion - Bush Is Going Nuclear On Iran. Unfortunately, that didn't stop Think Progress, or the AP. But then both outlets appear to have a tendency to go nuclear on Bush."
It's also worth noting that Hersh's track record in this war hasn't been exactly stellar.
UPDATE: A warning from Ralph Peters: "The most dangerous error we could make in our sharpening confrontation with Iran is to convince ourselves that its leaders will act rationally."