I wish I could get excited about this. But vote-jockeying over non-binding resolutions is the equivalent of consulting the owner's manual when your car catches on fire.
Our only hope is if the corporate interests decide that the $4.00 a gallon gas that will result from attacking Iran is going to seriously bad for business. Then they can go to their Republican bitches on the Hill and say "You're going to tell the President that if he attacks Iran without explicit authorization from Congress, he'll be impeached before the end of the business that day. Because if you don't, all the money we were going to contribute to your next campaign is going to your Democratic opponent. Who will certainly use it to buy TV ads with an old photo-op picture of you shaking George's hand with a shit-eating grin on your face."
But even a credible threat of impeachment may not be enough at this point. Like the Blues Brothers, Chimpy McFlightsuit has declared himself to be on a mission from God.