Not on any U.S. media, so I’m not celebrating yet, but on ITAR-TASS it says:

Abu Mus’ab al-Zarqawi, whom the US occupation authorities declared to be the “target number one” in Iraq, has been arrested in the city of Baakuba, the Emirate newspaper al-Bayane reported on Tuesday referring to Kurdish sources. Al-Zarqawi, leader of the terrorist group Al-Tawhid Wa’al-Jihad, was recently appointed the director of the Al-Qaeda organisation in Iraq.

The newspaper’s correspondent in Baghdad points out that a report on the seizure of the terrorist, on whom the US put a bounty of 10 million dollars, was also reported by Iraqi Kurdistan radio, which at one time had been the first to announce the arrest of Saddam Hussein. …

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Update: The U.S. is telling the media that they doubt very highly that he’s been captured.