Wow, Riley, Eh?
Even though I knew it was Riley before I saw his face, I still got a shock from seeing him. Before that moment, I suspected Riley might be Twilight, seeing as he could have had suspicions about Buffy's true motives due to her association with Angel and Spike. But AndrewCrossett, that's a good point about whom Riley's siding with. My guess is Twilight, but I'm open to the possibility that he's supporting Buffy. There's a darker side to Riley that we got to see when he was hanging out at the "vamp brothel" in Season Five, but that Joss hasn't really delved into. It'll be very interesting to see how Riley's part in all this plays out.
Other thoughts on this issue: I was a bit disappointed that the trip to the future didn't answer any questions, but instead posed more of them. For example, why did Future Dark Willow exist, and what were her intentions? If Buffy doesn't tell Present Willow about Future Willow, will Future Willow become a reality? Although I have to say, I'm not surprised Willow tapped into her dark side again, since she's seemed pretty shady this season--especially in "Anywhere But Here". Nice banter between Xander and Dawn in the forest, though, and it was still nice to see Fray again.