Guys guys, don't get so worried. Nations who seek nukes do so, and have done so since the 50s, as a detterent. No nuclear power has ever been invaded, guess why? If Iran wants nukes, or North Korea or whoever (talking only about nations here, run by sane men, and yes, that does include both Iran and NK) thats probably to stop Someone (India, Israel, the US, Japan, Russia, take your pick) from invading them.
Do I support nuclear proliferation? Of course not. Give me power, and I would destroy all nukes on Earth. But things aren't going to suddenly change if tommorow I wake up and there are 30,271 nukes on Earth instead of 30,270 that there was yesterday.
What I'm really worried about is what will happen if a country is attacked, and a powerful country at that, in order to prevent it from getting nukes. What, you think Iran will just sit there and take it?
Iraq is just a little ways away, Israel is within striking distance, Syria probably wouldn't mind hopping in if something started going down, the whole Afghanistan/North Pakistan thing is kind of shifty and the second anyone looks at Israel sideways, you can count on Uncle Sam joining the fray...so, not good.