Since AMM rev. Sep. 2010 for 737CL and 15.Oct. 2010 for NG it is possible to dispatch the 737 with damaged outer pane on 1 and 2 and heated glass Number 3 windows.
See added Note in the AMM inspection task of #1, 2 and 3.
More Details in the 737-FTD-56-09001 and 737NG-FTD-56-09001. Thanks to IFixPlanes for his input.