Who was in the cabin? Who told Locke to "Help me"? Who scared the crap out of Hurley when he stubbled upon the cabin?
We were first led to believe it was Jacob. Then we were led to believe that it was really MiB in the cabin. I think the proverbial sheep's wool has been pulled over our eyes once again. My reasoning is very simple. We were told that 'Jacob' hates technology. We know this to be false because of the scenes in 'The Incident.' One example is Jacob operating a vending machine. So that leads us to MiB. Does MiB hate technology? No, he doesn't.
Here's why:
If Christian is the MiB, how would you explain his most graceful use of a flashlight?