Ok, I'm a HUGE fan of "Lost", have watched, like Amber, since day one and wouldn't miss an episode. Here's my theory: All the main characters were killed when the plane crashed and all of them were replaced on the beach by clones supplied by the Dharma group, thus that is why Locke can walk, the black lady (don't remember her name) doesn't have cancer, Sun is pregnant by Jen, Ben (leader of "Others") will not let anyone escape island because they would find out they are clones and also that is why no one has reported anyone missing, because the originals are back home. The end of the series: the main characters will find the cemetery where they were buried after the crash. I know this is waaaay out there, but so is the series. What is your theory?
Lynn and Gin-Gin
