Time went by and Wilson saw an opportunity to try an embarrass the POTUS with an OP-ED in the NYT's once this issue came up. I believe he didn't think it would be this big of a deal and that is why he is not giving interviews or making any statements. I just hope he and his wife are made to come forward and explain why she would send someone with no experience to investigate something as serious as illegal Uranium sales, my guess is she sent him on a mini vacation on our nickel
Actually, the issue first came up earlier in the year (will try to piece together the timeline and post). In earlier interviews, such as the one with Moyers shortly after the State of the Union speech, Wilson had every opportunity to make his concerns known much more contemporaneously with that speech. But he did not. My understanding is that his NYT op-ed is what started this particular commotion over the past week.
The question is, why now?
We must never, ever forget that the media are corporations, and like all corporations, they are in business to make money. In the media's case stories are their product when you read "story," think "tale."
So the answer to why almost certainly is that it was timed to be published when the President was overseas, and when the WH press secretary position was changing hands. This is also at the beginning of the traditionally slow summer news period. Those behind this hit piece struck at a time guaranteed to catch the WH off guard, and when the media needed some story to flog for awhile to fill up summer air time and column inches.