Participative Web: User-Created Content (pdf, 74 pages) mentions Creative Commons several times.
According to the foreword:
This report was presented to the Working Party on the Information Economy (WPIE) in December 2006 and declassified by the Committee for Information, Computer and Communications Policy in March 2007.
Now the whole world knows … about User Generated Content and Creative Commons!
The document appears to contain no earth-shaking revelations, but does look like a solidly informative report.