By the way, the Cylon numbers are as such (the last few became known in the first episode of this season):
Number 1 = Cavil
Number 2 = Leoben
Number 3 = D'Anna [boxed]
Number 4 = Simon [who we NEVER see]
Number 5 = Doral
Number 6 = Six [obvious]
Number 8 = Sharon
Numbers 7 and 9-12 are the Final Five. I'm guessing Tigh, Anders, Tyrol and Tory are 9-12, and the final cylon is 7, since the number 7 often has special meaning in religion and fiction.
Although I'm sure the real reason for the last of the "significant 7" being number 8 is that when they mentioned Sharon's number back in season 2, they hadn't had the whole "Significant Seven/Final Five" thing planned out to the degree they do now.