Hanging?

From a cartoonist point of view there should be a punishment to fit the crime.

How about a wood chipper with the vent pointed at the crowd.
How cool for Bush and Cheney to be splattered in Victory.

Maybe a televised torture to death mini series. OR a realty game show where Saddam has to answer multiple choice questions to avoid certain tortures.

A good old fashioned Czar execution with every family member included in the carnage seems rash but we already have a good start with his sons already dead.

Death by a thousand cuts, Lines of Iraqis all get a turn to cut him with a teeny shick razor blade on a long stick.

Death by Ann Coulter. Let her go crazy on his ass.

Death at the hands of George W Bush himself.

other possibilities are too shocking for print.