Truthfully, I am in shock at the thought of this. It seems more than obvious that Isreal is behind the attack, and they show no real concern of trying to hide that fact. This comes right after additional sanctions have been added to Iran from the West, and the subsequent closing down of the Iranian embassy in the UK (due to protests that followed the sanctions at the embassy).
For the past couple of years, high-level Iranian nuclear scientists have been getting assassinated "mysteriously." By drive by shootings and car bombings. (a friend of mine in the state department knows a lot of inside intel, told me today Mossad had been behind all of these attacks).
It seems as though the West is completely cutting ties with Iran, whereas the East seems to be building a relationship with them. China imports a ton of natural gas from Iran and exports goods to them as well. Also, China and Russia have been looking to expand the Shanghai Cooperation Organization (which is basically a mutual-security organization similar to NATO by my understanding). Putin the other day released a statement essentially inviting Iran AND Pakistan (who also has terrible relations with the U.S. due to Osama's assassination and the recent attacks on Pakistani troops in Afghanistan, which was a preemptive strike regardless of what the U.S. says).
The Revolutionary Guard's leader has already stated that an Israeli attack would force Iran to attack Turkey's NATO assets (NATO has missile shields in Turkey as well as troops stationed there). Not to mention, Iran is the second largest country in OPEC. I guarantee the price of oil will surely spike (just look at oil prices during the 1990 Iraqi Invasion of Kuwait or even 1980 Iran-Iraq War).
Honestly, I don't think that Israel/U.S. thought about the dramatic consequences economically of this attack. The Stuxnet virus worked superbly, and I know another form was just found in Iranian computers by the name of Duqu that has a bunch of zero-day-based attacks as well. Why would the U.S. not attempt to utilize this technology? It seems to me from the IAEA reports that even if Iran is working on a bomb, it' still a year or two away from actual completion of one.
I'm sure that there will be retaliatory actions by Hezbollah and Hamas as well, Israel's about to become a war zone, I just hope things don't get too out of control.