Iran going nuclear is a big debate all over the world for some time, but this is not the real issue, in the end it is all politics, global politics. If we look at North Korea we see a hardcore communist leadership that managed to get the nuclear bomb against all the UN sanctions thrown at it and against all of Bush's hard words about countries that sponsor terrorism. Clearly, what the UN tries to do now to Iran has been proved worthless.
What Iran is trying to do is obvious, they challenge American control in the region. If we look at the Islamic republic's foreign policy we see states like Venezuela, Brazil, Turkey, China, North Korea, Lebanon, Syria, Libya, Sudan, as well as Russia. It also has strong economic relations with the EU. Can we condemn a state for trying to follow its own road? Personally I don't believe Iran is a threat to anyone, certainly not to the states named above.
It has a population of over 70 million, a rich history, dating back to the beginning of the human civilization, and a rapid growth, by all accounts it has the makings of at least a regional power. We should accept Iran as a global player, diversity never hurts, in fact it helps cooperation and evolution, doing so could also be a breath of fresh air for its internal politics. Nuclear energy is a must for any modern state and only cooperation and goodwill can help humanity.