White, I think that's what alot of us have been guessing for a long while now. But, in a recent interview with Katee Sackhoff, she says that you think you have it figured out (I think they were halfway through filming this season at the time), and they totally turn it on its ear. What looks somewhat obvious to those trying to figure it out may not be, at all.
I'm still sticking with the "guess", but I'm expecting to be surprised, and perhaps shocked. Would be kinda sad for all of us to have had this show figured out going back to like, season 1.