I got the feeling that Sayid knows something about Charlie, but I'm not sure what. I really didn't buy into Charlie being an other until a couple of days ago when I read some of the postings on this site, and then when I saw the flashback of him hanging, and they made a point of having that weird little talk at the end, I viewed it as almost a warning, like Sayid saying, "I know about him, and I have my questions about you." Almost like he wanted Charlie to tell the Others that he knew about them. But then I just read about the guns, and that makes some sense as well. I guess that's why this show is the greatest; because it twists your mind so much, you can't really see what's coming.

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The Dude abides.