Bit of an update here: The plot thickens. Michail Voitenko, who've been the source for quite a bit of the information regarding this debacle has left Russia, apparently at the suggestion by "some serious guys" who felt that he could use a 3-4 month vacation someplace else.
Also, a new theory that's making it's way around the net is that the ship was hi-jacked by Israeli intelligence in an effort to grab a cargo of missiles heading either for Syria or Iran...