Sorry about my Lost absences; my only excuse is that I hate you guys. But really, I have no clue how this will all pan out, but it seems like the show is leaning towards Jack becoming the next Jacob. I imagine he'll have to end up staying so that everyone else can get off the island, like when he cut Ben so Sawyer and Kate could escape. Still don't know how they're going to merge the two timelines... another nuke would seem a little anti-climactic.
Also, when you all have 5 minutes to spare:
Awesome.