Honestly, I think that if Israel were to strike Iran it would be the cleanest way.
One airstrike, end of nuclear reactor, Iran continues hating Israel... nothing changes.
It is the US that says, no, let us handle it...
I was thinking about this and discussing with friends yesterday and I came to the following conclusion:
If it becomes a definite threat, Israel will probably do something however... I was reading an article that said even if Iran's reactor is gone, they will still have a way of making dirty bombs by enriching uranium, and that is something that you cannot get rid of with an airstrike... so whats the point of bombing them? Just make em angrier...
Will diplomacy work here? probably not, so I think that ups the chances of a US invasion.
If it was just the reactor it would be best to leave it to Israel but it is more comlicated. I don't think we are capable of actually invading Iran or have any motivation to.
I have my money on nothing happening and Iran will do what it wants, but knowing Bush... He may enjoy another chance of being able to "send his boys in"