Oh man! I've been visiting an unofficial fan site
for the show. Theories about everything are legion.
I think Desmond will end up getting caught by "The Others". Who they are, I have no idea, but they've been there a while because the French woman, Danielle, has a history with them. And it's not good.
I don't want to spoil it for anyone on the west coast, so I'll leave it at that. My husband and I watch the show every week. I make him tape it if I'm out.