ON SECOND THOUGHTBush reverses course on Iran, and though I want to humiliate him for it, the fact is he’s probably doing the right thinghttp://slate.msn.com/id/2114704/fr/rss/Don't look now, but it seems that George W. Bush is committing diplomacy. The New York Times reports today that Bush has agreed to join France, Britain, and Germany in their nuclear-arms talks with Iran. This marks a major