I'm fairly certain Juliet's dead now. After all, Elizabeth Mitchell was a major character in the new "V" pilot, and if that goes to series she won't have time to work on "Lost" anyway.
I think Locke as Locke is dead, and the next season Locke as the Man in Black is going to be the major villain.
And I love how distrustful Richard has been of Locke, but I'm kinda surprised he just went with it as long as he did.
All in all, I think it was a fantastic finale, though the last shot made me absolutely furious. Guess we'll have to wait for the final season now ... so sad, it's almost over ...