IMHO - didn't vote.
I don't think that giving the UN the power would cut it. The UN doesn't have the teeth to really make things happen, but then again, the American's don't have the impartiality. If the Americans put in the temporary gov't and try to force the issue of democratic votes, I can see either a biased governing body and constitution (favoring pro-US trade).
If they put in a gvt and step away, I can see a new coup happening. Saddam and his supporters are still out there somewhere, and in a matter of years, can find their way back into office.
If they put more money and troops into the area, I can see them being accused of trying to bully the Iraqis into voting their way and I can also see the leash of power beginning to wear at the tempers of the Iraqi people.
If they cut funding, the fragile system may just collapse.
It seems like a case of damned if you do, and damned if you don't.