Holy hell, I just finished watching it...what a great finale, easily the best finale on TV this season. (At least that I've seen)
"So?"
How the hell does Locke get off the island? Doesn't that mean he had to get off the island and the same time as the oceanic 6 if he has to go back at the same time?
I wouldn't be surprised if the reason that Sun is trying to find the island with Whitmore is to see if Jin is still alive.