To help drive the point home, it would be great if someone has a specific example they could cite, e.g. of a derivative work that's substantially different from print books that are listed on places like Abebooks. It's fine if the actual example uses a public domain work, then points out that the equivalent is not currently legal with orphan works.
The Count of Monte Cristo movie comes to mind, and the original work's not even in limited availability. Those parties pushing for ever-expanding copyright are the same who have and continue to benefit from the public domain. They keep taking and refuse to give back. Discover Yahoo! Find restaurants, movies, travel and more fun for the weekend. Check it out! http://discover.yahoo.com/weekend.html