I've just got my hands on a data dump, and I'm disappointed to see that the
Body field of the posts is in HTML rather than Markdown. I know there's markdown in the original database, because that's what I see if I try to edit an answer.
I don't want to make life difficult for Jeff Atwood and his team by requesting this as a feature, so I'm asking: How do I recover Markdown from a Stack Overflow data dump?
(Thanks to Eric and to Jon Skeet, who pointed me at the data dump.)