Wild Theory Corner (Spoilers)
Kara "Starbuck" Thrace will, somehow, be revealed as the offspring of "special" Cylons Saul and Ellen Tigh, making her a Cylon by loophole (but not technically one of the Twelve).
This explains her mysterious death and rebirth (and subsequent discovery of her own charred corpse). Additionally, it serves as a sort of "genetic" explanation as to why her personality is a strange offspring of Saul and Ellen.
Or: Starbuck is a younger model of the "Ellen" line of Cylons.
You heard it here first!