Ok, there is a definite theme developing here. These episodes are all about Amy being something unreal. Last episode, she was a robot, now she's a doll, and the teaser shows that next episode she will be duplicated somehow and Rory will have to choose one. And then the aforementioned remark at the end about all being together again "in the flesh".
And the "bigger on the inside" thing is still being rather prominent.
Hmm....
Oh, and a couple more things -- I was just looking around to see what it was that the Doctor called George (didn't find it, got sidetracked) and saw that someone mentioned that this episode was supposed to have been before the Flesh ones, so that the comment about "in the flesh" would have led directly into that episode, which makes sense, and it does seem like the ending here would have segued nicely into the beginning of that one.
And speaking of that, what is up with the 13th century? At the beginning of the Rebel Flesh episode, Amy or the Doctor said 13th century monastery, I'm pretty sure, and Rory said no, don't think so, because of the music that was playing. And in here, either Amy or Rory said something in the dollhouse about being in the 13th century. Which makes more sense if the episodes were originally back-to-back, but doesn't explain why 13th century in the first place.