Known facts:
1. The CIA wanted to send someone to Niger to investigate Yellowcake claims.
2. Mrs. Wilson works for the CIA (in some capacity).
3. The CIA asked Mr. Wilson's wife to discuss it with Wilson.
4. Mrs. Wilson discussed it with Mr. Wilson.
5. Mr. Wilson went to Niger.
6. Mr. Wilson stayed at (read: inside) the U.S. embassy in Niger for all 8 days he was there, drinking tea and talking with people about the established Italian and British intelligence reports.
7. Mr. Wilson came back and wrote an op-ed in the NY Times that there was "nothing" to the claims that Saddam was trying to obtain Yellowcake from Niger. 8. Questions arose about who he was and how he was making these claims.
9. Mr. Wilson is married and his wife's name is published on his own biography page. 10. It is known in Washington circles that Mr. Wilson's wife works for the CIA. 11. Cliff May (of National Review) and Bob Novak (of Chicago Sun-Times) wrote articles critical about Wilson's involvement and how this came about. Novak includes Mrs. Wilson's name.
12. According to Novak, he was told that Mrs. Wilson was not a covert agent, but was an analyst. You can not believe Novak all you want. He is a well-known journalist with an impeccable 46 years of reporting and commenting. He has never been accused of anything untoward or inappropriate. Even his colleagues on the other side of the political spectrum have a notable appreciation for his journalistic skill.
The established facts above can't be disputed. How Novak came up with the name would be interesting to know (was he told the name or did he research it himself?). The investigation will determine what it determines. An investigation means nothing other than something might have occured.