To everyone saying that the Ponds weren't important to the story, maybe I'm not remembering but didn't Amy serve as the Doctor's conscience making him remember his morality. I thought that was the most important scene in the episode and it featured Amy at least. And then the week before we had Rory kind of serve center stage with his Father (Whom I'm looking forward to seeing again). It seems to me that the Ponds are still serving a purpose and all of this is leading towards the end somehow. I think they did serve an importance to the story, and in the long run we'll see that more clearly.