This has made the rounds, but in case you haven’t seen it, The Independent has a gruesome story on the prison where most of Saddam’s victims were slaughtered:
How many people fell through the trap-doors of Abu Ghurayb prison is a figure that will probably never be known. Thousands certainly — one former army officer who defected to the West said that 2,000 people were killed here in one night alone. But under Saddam’s rule, scores and possibly even hundreds of thousands of people may have met their deaths at the regime’s most notorious prison. Two hangman’s nooses lay on the floor, the loops of the waxed hemp rope wrapped in white bandages — presumably to prevent the rope from decapitating people.
For some perspective, Reuters’ last estimate on Iraqi civilian casualites is something less than 1300, which would be an off day for Saddam.