This episode was absolutely awesome, I kept shouting all by myself in front of the TV "THAT'S IT, HE'S DEAD!!" "NO WAY!!" FUCK YEAH" etc...
My biggest complaints though comes from the scene where Ben threatens Jack about killing the three losties caught on the beach. Why didn't the others simply do it?! Since when where they more humane than their leader?
And about Ben, I simply cannot figure out what was his plan. Was he serious about "talking them out" of calling for rescue, and getting out of this infernal island where they got stuck three months ago"?! And why did he bring Alex? Whatever. Let's just consider he suddenly lost all of his intelligence and all of his ability to make other people do whatever he wants them too because of the obvious fears he had. I wouldn't be suprised to see that it all was a brilliant scheme from Benjamin Linus though.
My 2 cents about the coffin, I don't know, I wouldn't be surprised if it was Sawyer. I mean no friends, no family, and Kate answering a clearly affected "why would I go see him"... why not. And tell if I'm wrong, but I think I've heard Jack saying to see his father "up there". That seems a lot like a subtle ambiguity that means a lot.
No ideas concerning Naomi thought. It seems a fairly elaborate trick, with the picture, the whole scenario... for once, Ben might just have said the truth. And the fact that Locke got involved... that gives some credits to Ben. I mean it's not like Sayid saying something, but it's still Locke!
Nothing to say about the underwater base. It seemed pretty logical to me that Charlie died, I accepted it and it was very emotional. Though I have a few doubts about Desmond. I don't know... he didn't seem to be telling the truth, don't you think? He had some weird chuckles. It's the first time we don't actually get to see the vision before it happens. And it didn't go exactly like he said it would. I mean, he would have noticed that he was there, he didn't mention a keypad, just a switch, nor did he see how Charlie actually drowned... I don't know. Smells fishy. But well...
So yeah, lots of things still coming. The question obviously being how will I wait until february to have some more.