From the Press Release dated May 17, 2007.......
Science Commons and the Scholarly Publishing and Academic Resources Coalition (SPARC) have announced the release of a new online tool to help authors exercise choice in retaining critical rights in their scholarly articles, including the rights to reuse their scholarly articles and to post them in online repositories.
The Scholar's Copyright Addendum Engine is an online tool created by Science Commons to simplify the process of choosing and implementing an addendum to retain scholarly rights. By selecting from among four addenda offered, any author can fill in a form to generate and print a completed amendment that can be attached to a publisher's copyright assignment agreement to retain critical rights to reuse and offer their works online.