I've updated the file on Smashwords to include:
1) A linkable table of contents (which is functional in .doc but not yet functional apparently in other formats.)
What's the point? Mark Coker says that Amazon and other sellers are requesting this functionality be added to ebooks they distribute. They're preparing their "Meat grinder" conversion tool to handle such formatting.
2) I received a detailed critique from:
http://the-great-white-ebook-shark.b...a-sparrow.html
that I took to heart and implemented.