I would like to see innovation in books like this http://vimeo.com/15142335 http://vimeo.com/15142335 Linking content in the books to outside real-time resourc

I would like to see innovation in books like this http://vimeo.com/15142335 http://vimeo.com/15142335 Linking content in the books to outside real-time resources. Alternatively, what would you think of a subscription based purchase model for a book where each year you pay $3-10/year for a book which is continuously being updated?