The AV Club interviews Damon Lindelof and Carlton Cuse. At one point they're asked if they know what's going to happen for the rest of the series:

Lindelof: Do we know the absolute end of the show? Yeah. We've had that in mind for quite some time. But can we hand you a script for the last episode of the show right now? No, because there are market fluctuations that we are unaware of at this point. Certain characters that you want to write more for sort of wear out their welcome sooner rather than later. [COUGH COUGH Nikki and Paolo COUGH COUGH] New characters are introduced, and pop in unexpected ways. The essential nature of that last episode is more specifically about what the last three or four scenes are, and us working toward those has always remained pretty constant.

At this point I have no idea if these guys are telling the truth or not, but this season has been more hit than miss, so if they're faking it they're doing pretty well. I suppose I'll be doing another liveblog tomorrow night, maybe possibly.