I am also not at all surprised that the Spectator got no press calls on the story. Morris was shut down right before his version was set to run in the Washington Post. The story is far too big, and would require questioning too many fundamental premises about our government, for the press to really want to follow up on it.
That is my theory. :)
The problem with the Mena tale is the same problem with the Vince Foster death -- even if there's something to it, there's no proof that would stand up in a court of law. Instead, you have to rely on verbal testimony, hearsay evidence, and looney conspiracy theory, all spun by some of the flakiest people on Earth. At the end of a very long road, all you have after all your pains is a highly circumstantial case, and your prediliction to believe it tends to follow your political alignment.