Read It 1st, the braincrack idea Hank had a few months ago, is now an actual website! With a newsletter! That will tell you about book-to-movie adaptions and many other wonderful things!
Hank just linked to the site on twitter a few minutes ago and is asking for feedback/bug reports and the like, so check out the site, take the pledge, sign up for the newsletter, and let him know what you think.
How a Book Becomes a Movie by Jackson Pearce.