Reports conflict on this, but possibly al-Zarqawi's successor in Iraq has at least been wounded. From [1] MSNBC:

BAGHDAD, Iraq - The leader of al-Qaida in Iraq was wounded and an aide was killed in a clash Thursday with Iraqi forces north of Baghdad, the Interior Ministry spokesman said.

The clash occurred near Balad, a major U.S. base about 50 miles north of the capital, Brig. Gen Abdul-Karim Khalaf said.

Khalaf said al-Qaida in Iraq leader Abu Ayyub al-Masri was wounded and his aide, identified as Abu Abdullah al-Majemaai, was killed.

Khalaf declined to say how Iraqi forces knew al-Masri had been injured, and there was no report on the incident from U.S. authorities.