OCLC Research has released Social Metadata for Libraries, Archives, and Museums. Part 3: Recommendations and Readings.
Here's an excerpt from the press release:
In the first report, the 21-member Social Metadata Working Group reviewed 76 sites relevant to libraries, archives, and museums that supported such social media features as tagging, comments, reviews, images, videos, ratings, recommendations, lists, links to related articles, etc. The results from a survey of site managers conducted in October-November 2009 were included in the second report. Social Metadata for Libraries, Archives and Museums, Part 3: Recommendations and Readings provides recommendations on social metadata features most relevant to libraries, archives, and museums and an annotated reading list of the literature consulted during this research. Social Metadata for Libraries, Archives and Museums: Executive Summary provides a high-level overview of all three reports. The group's final recommendation is that it is riskier to do nothing and become irrelevant to our user communities than to start using social media features.
Also available: Social Metadata for Libraries, Archives and Museums: Executive Summary."