Why We May Be in for More Flashbacks

This would published today on EW.com in an interview with "Lost" producer Carlton Cuse.

EW: What are the chances that he'll return in one form or another?
Carlton Cuse: The irony of Lost is that a lot of characters work a lot more once they're dead. Charlie could exist in someone else's flashbacks. Look, the island is capable of conjuring up things from people's pasts. It is entirely possible that Charlie will appear in the show again. We've actually talked a lot about it, but to say more about that right now might blow the element of surprise.

He said flashbacks. Hmm...