Yeah but how cool would it be if she were a Cylon?
She's not. She was told by the writers that she is the only one in the cast who has been guarranteed not to be one.
I don't buy that they are killing her off because Katee said that the character wasn't going to die at a recent con. From spoilers it looks like she is lost for a time and assumed dead and it has something to do with Leoban.