He's managed to screw Israel even more than he had previously, which I guess was his goal from the start. Hamas has announced that it will "agree" to a 10-year "hudna" (cease fire) if Israel withdraws to its pre-1967 borders: http://news.yahoo.com/s/ap/20080421/ap_on_re_mi_ea/syria_hamas_israel. Of course, a hudna is NOT a peace treaty--it is a ceasefire which the Muslim who makes it can break at any time and for any reason--and Hamas has said that it will never recognize Israel under any circumstances.
So, what has President Peanut Farmer really accomplished? Nothing other than to put even more pressure on Israel while placing precisely none on the Arab states.