NZ Bear got his hands on the Senate version of the Democrats' emergency supplemental bill, and posted it here.
He also alerts us to this news: The Senate version of the bill has an even worse provision regarding mandatory withdrawal than the House one:
"The President shall commence the phased redeployment of United States forces from Iraq not later than 120 days after the date of the enactment of this Act, with the goal of redeploying, by March 31, 2008, all United States combat forces from Iraq."