A couple of thoughts on last week’s show before tonight’s show:
The “R.C.” on Naomi’s bracelet might refer to Regina on the boat. If that’s true, she’s going to be REALLY mad that Naomi’s dead.
If there really is a time differential between the “real world” and the island (as shown by the payload that Daniel did the experiment with), and they don’t get off on the right baring (Remember Daniel warned about keeping the helicopter’s path on the right heading?) Jack, Sayid, Hurley, Kate and Aaron could end up in a different time than they expect. If that happens, they’ll all age, which could explain Aaron’s apparent rapid aging.