the week in BSG and Lost

I am enjoying the fact that BSG and Lost are both showing new episodes at the same time, one night after the other other. It cannot get much better than that. Too bad it will end in another week. I believe BSG season 4 is being split into two 10-episode segments, so episode 10 is next week after last Friday's "Faith". I have no idea when the last 10 episodes will air. And Lost is winding up Season 4 and wont be back until next year. So this nice synchronicity will probably not happen again.
So theories..
-Locke is going to move the island but will pay a heavy price -- perhaps he will become trapped in the cabin?
-The weird switch on Keamy is a deadman's switch that will blow the freighter. It wont get triggered.
- Desmond will end up back on the island, much to his surprise.

And as for BSG, excellent episode on Friday, with the revelation that the final 5 are from earth, which dovetails with the
theory that everyone is a cylon. This also explains how Tigh existed before the "First" Cylon war. So my theory is:

- Kobal is the first settlement of cylons sent from earth.
(a) Cylons decide to forget they are synthetic and exist as humans.
-the "humans" re-create the cylons
-the cylons rebel and Kobal is destroyed
-the "humans" flee back towards earth
-the cylons cannot stay on Kobal, so they settle 12 other worlds.
-goto (a)

I am now doubting Roslin is the fifth, and I would be pissed if the fifth was a minor character, I think it is in fact the obvious choice -- Baltar - he is going to unite them all after Roslin dies.