Well I don't know if more than 6 got off. Because I think that the reason they are so uncomfortable with one another, in the future scenes, is the high amount of guilt they feel for leaving everyone else behind. I think that only 6 could get off at first, but they promised that they would come back for the rest, and rescue them. Only thing is, they can't find the island. Remember, Jack says he takes a flight every weekend in hopes of crashing.

The guilt is was drove Jack to drinking, and drugs, Hurley back into the nut house, and perhaps played a roll in how the person in the casket died?

The thing I don't get about Charlie dying is, how did his dying really save Claire and Aaron? I understand that he was the one that was meant to push the buttons to unblock the signal, but he accomplished that, so when the man with 9 lives showed that he was going to pull the pin, why didn't Charlie just step outside the room, and shut the door? He did what he was supposed to do, so why did he shut himself in? Don't get that one yet? Maybe we'll find out later.

I have the first three seasons on dvd, so I think that when this season is over, I'm going to watch all of it again. Because I bet that I will find new clues for what's going on. I'm sure that things that happened in the first or second season, that didn't make sense at the time, will make more sense now, and maybe more insight into what is going on.