Austin Bay on the "cascading effect":

The short and long term significance of these "cascading effects" depend on many things, including American diplomatic skill and the emerging effectiveness of Iraq’s Governing Council, but here’s a list of interesting "could-bes":

Immediate security effects in Iraq: Saddam’s capture provided immediate operational intelligence, with the names of financiers, bomb-makers, and resistance leaders among his papers. His documents fingered another dozen terror cells in Baghdad.

Damage to fascist morale: Though Baath and Al Qaeda terror attacks continue, Saddam’s arrest saps the morale of even the most hard-core thugs. Chairman of the Joints Chiefs of Staff General Richard Myers said it well: "When you take this leader ...and find him in a hole in the ground, that is a powerful signal that you maybe on the wrong team and maybe should be thinking about some other line of work."

Strategic intelligence: Pumping Saddam for details on his Weapons of Mass Destruction programs will take time, but the long-term pay-off will be an improved US and UN capability to counter the proliferation of nuclear and chemical weapons. Likewise, the evidence that Saddam facilitated both secular and religious terrorists is mounting, Our ability to counter terror networks will improve.

It appears as though it's starting to work outside Iraq:

Libyan leader Moammar Khadafy, ostracized for decades by Western nations for his role in supporting terrorism, agreed yesterday to dismantle the country's weapons of mass destruction as part of a deal with Britain and the United States that would bring Libya slowly back into the international community.

I guess Khadafy didn't like the idea of being pulled out of a hole.

Glenn Reynolds has more.