Why not tell us the date and its significance?
The date of Moore's column is April 14th. For its significance, this site provides a very useful timeline:
http://www.abovetopsecret.com/forum/thread49809/pg1
It is after his release by Iraqi police / U.S. intelligence, which happened on April 6th. It is also four days after Berg refused safe passage out of the country, offered by an official at the U.S. consulate. He is known to have sent at least one email to his family on the 10th.
I believe, absent any evidence, and on pure speculation, that he also emailed his contacts at Moore's company, reporting that he had eluded discovery by U.S. intelligence and subsequent deportation, and would now be following up on a potential contact within the Iraqi "resistence." I believe Moore was so elated by this report that it motivated the over-the-top mocking tone of his April 14th column, as he was then expecting a scoop of galactic proportions: the first on-camera interview with a leader of the noble resistence against the hated, evil "occupying forces."
Berg was not heard from, alive, again.