Found this on the Lew Rockwell site:

A lot of speculation about MH370. Terrorism, hijack, meteors. I cannot believe the analysis on CNN – almost disturbing. I tend to look for a more simple explanation of this event.
What I think happened is that they were overcome by smoke and the plane just continued on the heading probably on George (autopilot) until either fuel exhaustion or fire destroyed the control surfaces and it crashed. I said four days ago you will find it along that route – looking elsewhere was pointless.
The Malaysian Jetliner: A Non-Conspiracy Theory ?

My personal opinion is the simplest explanation is most likely the right answer. Perhaps the plane crashed in to the ocean leaving little or no debris? It then sank to the bottom of the ocean, we would not be able to find it this way.