Saddam would have to be an idiot to think this administration is bluffing. The administration we have now would put a gun to their own head and yell 'I'm not bluffing, one move and I get it' and mean it.
In any case, killing Saddam would actually be easy. It's not like his army could slow us down much. The problem is always one of what happens afterwards. We have a consistant history of sticking losers and dictators into power, usually worse then ones we took out of power.
Jay