Byrne is the not so hidden wolf in sheep's clothing. He may own overstock, but he knows what the fuck is up in Wall Street.
There is a fascinating story that he tells in an interview that turned him on to investigating financial fraud in the following link http://peacerevolution.podomatic.com/entry/2010-05-18T16_27_48-07_00.
Basically some random guy comes to him and tells him he needs to do a few things with his company or he will run into trouble. Bryne doesn't believe him and this guy makes 3 predictions, all of which come true. One of the predictions was journalistic hit pieces written against him in a specific time frame. Can't remember the others currently...something to do with Overstock being illegally listed on foreign exchanges and some other one. (Byrne didn't do the illegal exchanges, someone wanting to attack overtsock did it.)
Bryne tried to reach the guy a year later and realized this insider knew a ton that he need to investigate.
There is a secret about wall st. so huge, if the public found out it was true, they would probably set NYSE on fire. It's also covered in the interview, I can't really do it justice.
Nice link, thanks