...while others, including Syrians, are being talked to. And some are talking back. From AP, via the Sydney Morning Herald

US officials are interrogating Iraqi officials who have been taken into custody and some of them are "providing information that is useful", Defence Secretary Donald Rumsfeld said.
Rumsfeld told a Defence Department briefing that between 7,000 and 7,500 Iraqis have been taken prisoner, but that lower level ones like foot soldiers are being released.
...
Rumsfeld expressed satisfaction that Tariq Aziz, the former deputy prime minister under Saddam Hussein, was among those in custody. Aziz surrendered.
A top Iraqi intelligence officer was the latest apprehension confirmed.
Aziz "clearly is a very senior person and was in that regime and we intend to discuss with him whatever he's willing to discuss with us", Rumsfeld said.
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Rumsfeld said that along with the Iraqis taken into custody were some Syrians who were "in there doing things they shouldn't have been doing".
Overall, "We're keeping the hard cases separate for the most part. We're systematically going through less hard cases and releasing people." He said about 1,000 had been released so far.
"We obviously don't want to hold any more people than we have to," Rumsfeld said.