Useful BBC review of the current Iran situation. It is all down now to internal politicking in Iran's elite. By no means all Iranian politicos accept that AhmadiNajad's election was fair. We shall see what emerges.
Meanwhile, Saudi Arabia has given Israel the nod in case they need to use Saudi airspace in an attack on Iran's nuclear facility. Apparently the Syrians also would not be displeased if the Iranian nuclear weapons effort met with an accident.
Nuclear is more trouble than it is worth. Always remember that if every Iranian were to be given 1 square meter of photovoltaic panel, it would create as much energy as their civil nuclear power effort.