While the prospect of Iran having nuclear weapons is a scary one indeed, the diplomatic options have not yet been exhausted. We're not dealing with the Taliban here - as long as moderates like Khatami are part of the Iranian government then they're willing to listen. We shouldn't be hasty and talk of military options rightaway.
I agree it would be vastly preferable to wait for the Iranian regime to fall on its own, which it will given time.
You're right, it definitely will fall. I compare the current situation in Iran to eastern Europe in the mid-1980s. More and more people are demonstrating against the regime; there is a growing undercurrent of change. Give it a few years and Iran will be a fully respected member of the world community. Well, hopefully.
