I think J.k. Rowling will cave once she is convinced that ebooks are something that will not go away. No matter how rich she is, I don't believe that she will denie future generations an oppurtunity to be introduced to her extraordinary series just because she doesn't like the format that the text is contained within.
Check out my books, free stories and blog:
http://www.smashwords.com/books/view/6119
http://www.trbraxton.com/
http://www.amazon.com/Dirty-Hands-T-...dp/0984124403/
http://thecuriousmindoftrbraxton.blogspot.com/