Not really.
I used to think that about Saddam, too, but to the best of my knowledge, we got very little useful intelligence out of him, and he's making his trial into a media circus and still rallying followers. Zarqawi in a jail cell would be almost as dangerous as Zarqawi outside one. We picked up a lot of useful information from the place he was in, and from a lot of other raids.
Oddly, Zarqawi was famous, at least according to his publicity, for constantly wearing a "suicide belt" filled with explosives, even sleeping in it. What happened to that?
