I looked back a few pages and haven't seen this mentioned.
Could Charlotte be the baby from the beginning of Season 5. You see a Korean couple in bed and he wakes up to care for the baby, if you watch the link below you'll see the baby is not Korean. Charlotte talked about how she and her mom left the island and this would explain that she can speak to Jin because she was raised by a Korean couple.
http://www.youtube.com/watch?v=e0adL4B-udM
-r
Good catch. I think that there is a very high probability that the baby being raised by Dr. Pierre Chang (aka Dr. Marvin Candle, Dr. Mark Wickmund and Dr. Edgar Halliwax, the guy in the orientation films) is Charolette, and her mother (the asian woman in bed) decided to leave the island after finding out something. Later in the scene, Daniel bumps onto him during the building of the Orchid. Maybe he sticks around until Charolette is a little older so that he can warn her not to return to the island.