Just a few things I've noticed. Maybe they're meaningful, maybe they're not.

1. I don't believe Leoben. I've seen the posts stating that he doesn't lie, but what about Kasey, Starbuck's "daughter"? He obviously lied to Starbuck during their entire time on New Caprica.

2. I think the humans are really cylons idea answers alot of questions. Mostly importantly it explains why the species can cross breed and it explains the "this has all happened before" concept. However, it doesn't explain why Baltar's cylon detector actually worked (remember it identified Boomer). While it's possible that the writers developed the detector before everything was planned out, I don't think it is likely. In fact, someone mentioned it in the last episode. I think Adama complained about how it didn't work. If the detector wasn't a part of the writer's original plan then why mention it again? I'm guessing that it will be important in the near future. Someone might decide to put it to use.

3. I'll be disappointed if anyone but Baltar is the final cylon. Someone here had said, and I completely agree, that the drama in this "revelation" isn't who the final cylon is but how his story plays out. I think there's much more to Baltar than meets the eye and I'm looking forward to seeing how intentional his character arch really is. I can't see how anyone else will be anything but gimmicky and disappointing.