The Short, Violent Life of Abu Musab al-ZarqawiSupposedly Zarqawi took periodic refuge in Iran, though perhaps not in the past 1-2 years. Makes one wonder if his demise came after Iran decided his usefulness had ended.
... We know Zarqawi better than he knows himself,” the high-level Jordanian intelligence official said. “And I can assure you that he never had any links to Saddam. Iran is quite a different matter. The Iranians have a policy: they want to control Iraq. And part of this policy has been to support Zarqawi, tactically but not strategically.
It dose say something about Iran's approach to the 'great game'.
Update 6/11: It occurred to me shortly after posting this that if I were running US psyops, I'd go to great lengths to plant the story that Iran was running Zarqawi. Of course this doesn't mean they weren't, but if I were behind the story, I'd plant it this way ...