Something tells me a deal was struck between the Oceanic Six and whoever rescued them that they wouldn't tell anybody about the rest of the survivors being alive. I think the guilt is driving Hurley nuts and later Jack. I want to know who was in the coffin but Matthew Fox said it hadn't been revealed in the eight episodes produced. I THOUGHT it would be Micheal but if only six got off the island it doesn't seem likely.

And yes, Charlie became an angel. That makes perfect sense to me.