The Swift Boat Vets have put the kabash on speculation on their site as well.
http://www.swiftvets.com/phpBB2/viewforum.php?f=6
More info on the Swift Boat site:
Because of a temporary restriction on discussion of the Alston story here's a link to where the story is being worked. Lot of new evidence. Not conclusive but gathering.....
http://www.captainsquartersblog.com/mt/