The Digital Curation Centre has released "Creative Commons Licensing" as part of its Legal Watch Papers series.
Here's an excerpt:
CC is of great relevance to digital curation in the way it simplifies and increases third party access to and usage of copyright works. Curation is dependant on a range of strategies that require the making of copies and modifications. Unhindered, copyright could impinge on digital curation considerably. However use of these licences may ameliorate the difficulties.