The Authors Alliance has released "Authors Alliance & Creative Commons Launch New Termination of Transfer Tool."
Here's an excerpt:
Termination of transfer allows creators (or, in some cases, their family members) to regain copyrights to creative works they may have signed away decades ago. Our tool helps them understand if those termination rights exist, and if not, when they may exist in the future. With rights back in hand, authors have many options for getting their works in front of new audiences, from sharing their works with the public using a Creative Commons license to negotiating new agreements with publishers.