still, i wouldnt go that way. you are sending the iranians a wrong message and you are sending everyone else a wrong message. i rather see the major powers, namely EU US PRC, dont try to cheat out of this one. bottom line should be, iran not having nukes, and no sanction. if iran does get nukes then it wont benefit PRC because it means PRC will have to give up the oil contract it signed.
Bottom line is Iran has the right to tap nuclear power just like China. Nothing so far proves that Iran has and will develop a nuclear bomb.
If and when there is proof of Nuclear weapon development, then I would support a sanction. I am however more skeptical with the accusations of nuclear weapon development. The Americans have an agenda and I would not take their word on this.