I read speculation about this about two or three weeks ago in a Jewish blog - believe it was in an article by a Member of the Knesset.
Interestingly, I refered to this in a post earlier about the "NIE" (fraud) that just came out.
http://www.freerepublic.com/focus/f-news/1934533/posts?page=26#26
Since I believe that Iranian scientists were killed at the Syrian site when the Israeli's attacked, I think this throws great doubt on the NIE....maybe Iran has outsourced the making of a weapon, but they are still involved.
Smells like ... Friday ............................... FRegards