I'm in the midst of rebuilding the web site for the Orange County Heritage Coordinating Council, a non-profit local history organization on which I serve. I wanted to include a calendar of HCC events, as well as all Orange County local history events... but I didn't want to have to compile and enter this all myself.
OCLC has just gotten into the social bookmarking act. Registered WorldCat users can now bookmark bibliographic information on any of the long list of supported social bookmark sites.
From the detailed bibliographic record, click on the Bookmark button and choose which service to use.