About Cylon numbers:
8 remaining Cylons aboard the Fleet make sense, I think.
There are supposed to be 12 models. The fleet does already know the models Boomer, Shelley Goodfrey, Leoben and Doral, that means 12-4 = 8. The only way to identify a Cylon now is either by a working Cylon Detector (that is not manipulated by Baltar) or by him doing something to directly identify him by actions. Comparing photos will fail then...
I still doubt Tigh´s wife is a Cylon - unless maybe Moore & co have decided that the humans "great gift" is murder, and the Cylons gift is manipulation and deciption. I tend to think both are human talents (at least if I am in a cynical mood, which luckily doesn´t happen to often).
I hope Cally is not a Cylon, and I don´t believe so, especially since she now will be in trouble...
About Adama and Roslin:
I think both have good reasons for their actions, and unfortunately, only one of them can be right. Either there are gods, the prophecies are true, and Roslins plans must be followed while Adama has to step back behind her, or she is mad and has to step down and Adama has (or had) all the right to force her to step down.
But there is a way out of this, though it´s a long way - both of them have to come to a mutual agreement that fighting each other will do no good, and have to reach a compromise between religious beliefs and military needs - how this would work exactly though is a lot more difficult to say. But I think if they can both work together, they will be a great team.
About Starbuck:
The original Starbuck was basically the typical flawless hero of its time. His character would be boring by today´s standards - probably most wouldn´t simply care for such a character, and he wouldn´t add much in terms of the shows drama.
The new Starbuck is based on the old, except that she is no longer entirely flawless. She might be technically perfect (brilliant pilot, player, athleth and sniper), but she lacks in the personality and emotional department. This allows for some interesting dramatic developments, but unfortunately it leads also to a controversial character with unlikable attitudes. Personally, I like the new Starbuck, even with all her flaws.
Basically all of the original characters have been changed this way in the new Galactica, but for Starbuck it often seems more apparent, probably due to the kind of the flaws she has.
About the destruction on Caprica:
If I remember correctly, they noted in the mini-series that nuclear bombs were detonated in the upper atmosphere of the planets. I think the Cylons primarily relied on the radiation to kill the population, trying to keep the infrastructure in a good shape.
Other aspects of the episode:
Finally we see some resistance on Caprica.
