"...There was fragmentary intelligence gathered in late 2001 and early 2002 on the allegations of Saddam's efforts to obtain additional raw uranium from Africa, beyond the 550 metric tons already in Iraq. In an effort to inquire about certain reports involving Niger, CIA's counter-proliferation experts, on their own initiative, asked an individual with ties to the region to make a visit to see what he could learn. He reported back to us that one of the former Nigerien (sic) officials he met stated that he was unaware of any contract being signed between Niger and rogue states for the sale of uranium during his tenure in office. The same former official also said that in June 1999 a businessman approached him and insisted that the former official meet with an Iraqi delegation to discuss "expanding commercial relations" between Iraq and Niger. The former official interpreted the overture as an attempt to discuss uranium sales. The former officials also offered details regarding Niger's processes for monitoring and transporting uranium that suggested it would be very unlikely that material could be illicitly diverted. There was no mention in the report of forged documents -- or any suggestion of the existence of documents at all.
So it appears the the one who heard the 1999 story was Wilson himself - which he reported - but declined to mention in "What I Found in Africa" and such.
Tenet's testimony also gives us a definitive answer to the question of "Who sent Joe Wilson to Niger in the first place?"
Apparently, it was his wife, Valerie Plame, and her boss, (the now resigned) Alan Foley.