I really hope there's some collector's, special edition, unrated, director's cut that is released on dvd/blu ray that adds another 2 hours of unreleased footage. Not a 6hr Dances w/Wolves addition, but something that gives us more of what the book covered that the theatrical version couldn't squeeze in.
After I filled her in on some of the changes from book to film, she's decided that she wants to read the book.