No one has mentioned that the objective is to kill Ben. I knew it was Ben as well, although a deeper voice, possible an upset scolding father tone.
As for the time shift.. Some guy has a theory, and he made in May of last year, that the series started and the plane crashed on 9/23/04, the series will end on 5/18/10. He goes into great depth in regard to how we are watching the island in real time, and that this rescue takes place sometime in the future. Basically it equates to 5months on the island translates into 5 years in real time.
Most people cannot grasp this whole time thing, it makes me wonder about the educational system in their respective countries.