The following new free resources on copyright have just come to my attention:
Copyright Watch: Hosted by the Electronic Frontier Foundation, CW includes a user-friendly database of national copyright laws from around the world, and a blog; the site is intended to be a place to share information about copyright legislation and developments on a global level.
Columbia University Libraries Copyright Resource page: Includes some excellent summaries and tools, including case summaries, model agreements, and much more; I particularly like the Fair Use checklist.
“Copyright and Cultural Institutions: Guidelines for Digitization for U.S. Libraries, Archives, and Museums” : a new book by Peter Hirtle, Emily Hudson and Andrew T. Kenyon from Cornell University Libraries, available as a free download.