[AntEater]

First of all, I don't want to go to war at all. You got me wrong on this one. I voted no.

Yes, but what can a limited bombing campaign accomplish?
- it cannot, by any guarantee, eliminate Iran's nuclear program entirely. Iran had years to prepare for this eventuality
- it cannot remove the existing regime, in fact it will most likely strenghten it
- it will give Iran a casus belli for creating all kinds of havoc like blocking the straits of Hormus, open support for shiites in south Iraq, maybe even a limited cross border guerilla campaign. When the bombs start falling, there is war and there's no reason for Iran to hold back and not do all the damage it can do. And as I said above, the world economy will start hyperventilating as soon as there's the slightest suspicion of any armed conflict around the straits.
- it will basically be open ended, for the fact that if no one can guarantee the total destruction of iranian WMDs, and because of the reasons 2 and 3 it will most likely be expanded to include targets like iranian naval facilities or facilities of the Pasdaran. There could be a "mission creep" where a limited campaign slowly slides into an all out air campain
Basically, you can bomb the crap out of Iran and when the rubble clears, all you have done is postponed the problem for 5-10 years, given the mullah regime a new lease of life and killed hundreds or thousands of Iranians, caused economic destruction that will cause mass unemployment and a ****load of other consequences. Not to mention the fact of turning around public opinion in Iran, which seems strangely pro US from what I heard and read into the government line.
And then after Iran has recovered, or even if it hasn't, who is keeping the mullahs from starting it all over again?
Then what? Another bombing campaign? Bomb Iran once or twice a year for decades whenever the US has suspicions of such activity?
Basically this whole scenario could drag on indefinitely and could close down for business the persian gulf and Kuwait and most of the gulf emirates for the time being.
If Milosevich himself had not given in, NATO could've bombed Serbia until it ran out of bombs, and Milosevich was a european head of government, not a mideastern head of a bunch of religious fanatics.
So if any US administration goes to war over Iran, it is basically in a lose-lose situation. It can wage an air campaign with the described consequences or it can wage a ground assault which will cost countless lives and, as you say might lead to another Iraq.
I don't have a patent solution, I don't like Iran becoming a nuclear power either. I suppose with both current administrations (plus with the current israeli non-administration) there's nothing to do but hope neither of them does anything stupid.
A new iranian president might be behind their nuclear program as well, but the west can better negotiate with someone who does not regularly threaten Israel.
But if the US decides it needs another war, in my opinion an invasion would be the better answer.