I heard about this on the Seekerville blog. Agent Natasha Kern posted on this fascinating subject.
Honestly, I hadn't considered the moral premise of my stories. Theme, yes. Values, yes. But not the moral premise.
This post is worth reading, though a little long. Also, The Moral Premise blog looks like an interesting place.
How do you treat morality in your stories? Is the moral fiber of your MC the driving force behind the character's decisions, and thus their story? Do you think theme and moral premise are the same? (Susan did an interesting post on this, though I couldn't find it in her archives. Maybe she can tell us.)