One thing to note, early on when the plane was first 'lost', many family members reported that when they tried calling their loved ones on the plane, instead of getting the call going straight to voicemail it was ringing instead. Of course the China Cellular company stated this is completely normal as it doesn't always go direct to voicemail. But it does make you wonder, if this was a hijacking and all cell phones were confiscated while in the powered on position, there would be a bag full of cell phones ringing. So it quite possible that there are innocent survivors remaining.
http://feedly.com/e/ZaR-UI6l