'Doh! Didn't catch it. Now I have to watch the whole show again. Addiction.
My pet theory:
Seems like they're setting up for the "Oceanic Six" to return to the island eventually. I'm thinking the final season. I can't see this flash forward stuff really holding up for three seasons, but maybe the next two. I like to think the last season will be entirely in the present tense, with the narrative of the regular show catching up with the beginnings of the flash forward period, and the flash forward period becoming the present tense, wherein people return to the island.