Creative Commons: Add-in Support for OpenOffice.org
Creative Commons was one of the sponsors for students who participated in the Google Summer Code project. One of their students worked on developing an OpenOffice add-in that allows one to embed a Creative Commons license in their Writer, Calc, and Impress documents.
The add-in is available without charge at http://wiki.creativecommons.org/OpenOfficeOrg_Addin. It is licensed under the GNU General Public License (GPL.)
Oh, you can also get the similar add-in for Microsoft Office from their site too.