Almost correct Ghostmaster. The actually story of the shirt being found was broke by the C'Ville Weekly on January 29th.
http://www.c-ville.com/index.php?cat=1991704080566501&act=post&pid=12032901101847453
and then was brought to the forum at findmorgan.com. While the validity of the find was being discussed, a member who had joined the forum on January 26th, an expert in geographical profiling in missing person cases stated for the record the shirt was in fact Morgan's. His appearance wasn't really out of the blue, he was working with Monica Caison and the CUE Center for Missing Persons doing a geographical profile, for the search that was upcoming. His post confirming the shirt was Morgans was one of his first two or three posts on the forum, but his posts were not the initial posts about the shirt. He posted 17 times outside the shirt thread also.
From an inside source at findmorgan.com, he was asked by Dr. Harrington not to talk about the shirt till dna came back and confirmed 100% it was in fact Morgan's shirt.
Dr. Harrington never made any comment on the findmorgan.com forum about the shirt.