Okay, just to fuel some more speculation on the whole baby Aaron in the future angle - I just finished watching "Greatest Hits" (2nd last episode of Season3) where Desmond tells Charlie about his vision of him drowning in The Looking Glass station. Desmond also tells Charlie that both Aaron AND Claire get rescued and fly off the island in a helicopter in his vision.

So I'm assuming something happens to Claire on the freighter, or later on?