I'm with Jumbotron
According to the Cover Story The Oceanic 8 who survived the Crash:
Jack
Kate
Hurley
Sayid
Sun
Jin
Claire
Aaron
Jin and Claire are the 2 who died after the crash. It was necessary to say they survived the crash to explain Aaron's existence when they are rescued and Jin's pregnancy. Leaving the famous Oceanic 6:
Jack
Kate
Hurley
Sayid
Sun
Aaron
I don't believe Kate's Aaron could possibly be her baby. That Aaron appeared to be about 18 mos to 2 years old at the time of the FF. That would mean the FF takes place approximately 2 1/2 to 3 years after rescue to allow time for pregnancy and birth. However, Kate is just now coming to trial for her crimes pre crash. No way a Federal Murder case takes 3 years to come to trial.
Jin is still alive on the island, my guess is only a few were able to get off and Jin (and probably Juliet) made sure Sun was one of them. The old cell, the Year of the Dragon, working for Paik and married 2 months were dead give aways that this was a FB.