Unconfirmed reports suggest that Zarqawi may have been captured near Hilla. The Arab media has been running the story this morning. I just finished speaking with a Coalition spokesman. He could not confirm whether Zarqawi was in custody, but suggested that the relevant operations may have been conducted by Iraqi Security forces. (In which case, the announcement would come from the Iraqis as to his capture, not the Coalition.)
UPDATE: Brigadier General Mark Kimmitt has said that the rumor is not true.