OCLC announces new Web 2.0 features added to WorldCat:
http://www.oclc.org/emailcontent/articles/worldcat/updatesoffers.htm .
They have added user reviews and rating features, and cover art to user-created lists. Users can write reviews in their preferred language.

If your library has been discussing the addition of Web 2.0 features to your catalog, this may give your committee additional reasons to add the features to your own OPAC.