My MacBook is back.
Apple handled the fried cord professionally and in a way that ensured that I will be telling the story to everyone in a way that should capture them devoted new customers.
I've never had such a good experience with anyone in the PC world (with the exception of Laptops for Less, a fine company.
The part arrived quickly, the damaged one can be returned for credit. The support staff was professional, and courteous. And, very understanding about the fact that not having my laptop was REALLY horrible. They were, shall we say, empathetic.
What a nice experience!