The Times Talks Live: LOST event was broadcast to theaters last night and my wife and I went.
Pretty enjoyable, and they told a few things about the finale. Walt (and why he is special) will be a factor (or at least present) in the finale.
At the end they showed a scene from the finale. It is basically this with another minute or so tacked on. Sawyer does a Sawyer-move and takes the rifle from Ben.
Flocke makes a comment about killing the candidates and Sawyer says something like "We ain't candidates no more"...and Flocke gives a look Sawyer probably shouldn't have told him that.
Sawyer leaves after making a comment about stopping him from using Desmond to destroy the island. Ben then asks Flocke about destroying the island since Flocke told Ben he'd be in charge after he left. Flocke says sure you'd be in charge, but the island'll be at the bottom of the ocean. Flocke does say there's room for Ben on his boat then.
Flocke looks back at the well and then looks down on the ground where you can see footprint. Flocke says..."There was a dog here."
So Rose and Bernard--with Vincent--got Desmond out of the well? There better be a happy ending for them or I'll be pissed!

They want to stay on the island so Rose can stay alive? Let them. Keep the damn islad up just for them.