Librarians across the US are heavily involved in efforts to promote free and open textbooks. I don't really know what's happening, but university librarians all over are promoting open texts, providing hosting for them, working together to catalogue them, working with writers and instructors on copyright issues, etc. Some of them are putting money into texts, too -- I'm getting some funding to pay for a copyeditor, for instance. Departments have not (in my admittedly limited) experience ponied up cash or other support, although they seem to think open texts are nice.