I think Israel ought to be part of the coalition. Saddam is, after all, exporting terrorism into THEIR country. They have a stake in his destruction.
And since it appears no Arab nation is going to join us in going after Saddam, Israel should be allowed to join in the effort. Who's going to either argue with us, or do anything about it, if we say that we and Israel are determined to rid the Middle East of all murderous scum.