I may be wrong, but I think the Security Council will approve the attack on Saddam. Five nations have vetoes. The US and Britain are obviously going to vote for it, the French will whine publicly but won't want to be the scapegoat, the Chinese will probably abstain since they don't want to loose favored-nation trade status and other perks from Congress, and the Russians may just join us as a means of promoting that thawing out between Pooty-Poot and Bush.
If I were Bush, I'd go for it.
Russia and China have already announced they intend to veto.