Actually, it looks like he associated himself with the Kerry campaign and then came out with his op-ed. He doesn't high-light that little factoid, though.
No, you have it backward. Wilson wrote his little article for the NYT, and was picked up by Chris Lehane, who was working for Kerry at the time. Lehane arranged the Vanity Fair article and the media frenzy. I bet that explains a lot, knowing that Chris Lehane was responsible for this bombshell.