Also, whats up with Richard? Evidently, he can move through time, since we see him trying to find Locke as a child, and he looks exactly the same. He's aware of the time shifts, but I dont know his role. We know he's part of the group known to the Dharma Initiative as a "Hostile". I think he might be linked to Jacob, the man in the hut where Locke learns from Cliare and Christian that they have to move the Island.
I think Faraday, Richard, Desmond, and Matthew Abaddon (The guy who talked about his 'walkabout' to Locke while he was in the hospital) are all very special, and have the ability to essentially time-travel.
Faraday- His notebook with notes from different time periods would be a hint at this, plus the fact that the Dharma Initiative's creation was roughly 30 years prior to his appearance (re-appearance) on the island from the freighter.
Desmond- I believe Faraday said this was true for him already.
Richard- Always looks the same... Seems pretty obvious that he's special. I think he came on the Black Rock over 100 years ago. Also, he mention in the premiere to Locke after he was asked "How did you know I was here?", he says, "You already told me" or "You're going to tell me" or something like that.
Matthew Abaddon-
Here's my theory about him:
He came to the island on the Black Rock, as a slave in the early-mid 1800s.
His 'miracle' he experience on the 'walkabout' was him escaping/being freed on the island after the ship wrecked or whatever happened to it. Since then, he's gained the ability, similar to Richard (and possibly Jacob), to 1. never age, and 2. time travel.
Abaddon is very mysterious. We've seen him with Locke before the flight, with Hurley after the rescue... And we've seen him speaking with Naomi about the Kahana (the boat that the mercenaries and Daniel, Charlotte, Miles, and Frank came on) Could he work for Widmore? Or is he still connected with Richard and the island if he was in fact on the Black Rock with Richard (and Jacob?)
Could Faraday have come from the Black Rock? What about Desmond? Is the Black Rock special in some way, or is it just coincidence that 2 of the 'time-travelers' seem to be connected with the Black Rock's final voyage? If it isn't related to the Black Rock, then how and why are certain characters seemingly able to travel through time, or at the very least have a knowledge of the past, present, and future that the rest of the Losties don't have?
I hope this is a pretty big part of the final two seasons (these guys, or any others like them), because it's very interesting to me.