I think Leoben looking shit scared and running away from Starbuck was probably my freakout moment of the episode. This guy has been going on about prophecies and destinies for who knows how long, and when he saw the (supposed) dead body of Starbuck, he's probably thought to himself 'Oh shit, everything I thought I knew/believed has just flown out the window!" and just bolted.
Ellen as the fifth? Meh, not feeling it. Bit of a letdown in my opinion. If she is the fifth, I'm glad it's out of the way early and they can concentrate on actually explaining this mess of events that's going on. Earth was populated by Cylons, nice little twist.
Best show on television.