Randi Rhodes has been saying this for years

But the outing of Valerie Plame was also to take out her CIA company Brewster Jennings. Via Morse at Mock Paper Scissors:

According to U.S. intelligence sources, the White House exposure of Valerie Plame and her Brewster Jennings & Associates was intended to retaliate against the CIA’s work in limiting the proliferation of weapons of mass destruction. WMR has reported in the past on this aspect of the scandal. In addition to identifying the involvement of individuals in the White House who were close to key players in nuclear proliferation, the CIA Counter-Proliferation Division prevented the shipment of binary VX nerve gas from Turkey into Iraq in November 2002. The Brewster Jennings network in Turkey was able to intercept this shipment which was intended to be hidden in Iraq and later used as evidence that Saddam Hussein was in possession of weapons of mass destruction. U.S. intelligence sources revealed that this was a major reason the Bush White House targeted Plame and her network.

(Update: Corrected link)