Since the Bush administration itself now says, in effect, that Ritter was right -- no WMDs in Iraq -- I suspect Ritter may be rather marketable as an analyst.
I have seen many references in the news media that in the time period between Bush making his intentions known with respect to the invasion of Iraq and the actual invasion (you remember our multiple wasted efforts to get the UN to enforce its own resolutions) Saddam moved his WMDs to Syria. This remains an open file and does not make Ritter right.
And further, with respect to Ritter, a stopped clock is right twice a day!
Unless, of course, you want to throw in the time he testified under oath to Congress that Iraqi WMD's were a direct threat to the US.