Wow, I am still digesting tonight's Lost Season Finale. I definitely think the guy Sawyer shot was the person who appears in the training videos. If you have Tivo, go back and look at his hair when he is lying down dead at about the 51 minute mark.
I think the "Quartatine Sign" was pulled off the sky which is somekind of Truman Show style roof.
I did call that "Herny Gale" was indeed the leader of "The Others."
Let the long wait for season 3 begin!