If I'm not mistaken, Wilson signed on with J F'n K's campaign as early as March 2003 and his NYT op ed was written in July. I'll try to find a link to the timeline.
I seem to remember it was after; lemme know what you find out.
I believe that Wilson donated money to Kerry in March of 2003.
I'm pretty sure that you are right...in any case, Wilson was already working for the Kerry campaign when he wrote the Op-Ed.
Also, this article goes back to the reason why some CIA analysts said that Iraq wouldn't have been seeking yellowcake from Niger: These analysts argued that Iraq already had plenty from the previous purchase.
Another thing of note: Compare the President's wording that Iraq was seeking yellowcake from Niger to Wilson and the MSM's argument that Niger had not sold them any. From the beginning there was clearly intentional distortion of the argument by all of those talk shows and articles - not just Wilson.