http://wisewindow.com

http://www.radian6.com/resources/ 

http://blog.nielsen.com/nielsenwire/social/

http://www.socialmediaexaminer.com/

http://www.crmtrends.com/socialmedia.html

http://wiki.beingpeterkim.com/

http://www.beingpeterkim.com/2008/09/ive-been-thinki.html

http://www.beingpeterkim.com/2009/03/smm-wiki-analysis.html

http://www.globalsocialmedianetwork.com/?page_id=201

http://www.ignitesocialmedia.com/social-media-examples/26-social-media-marketing-examples-in-detail/

http://www.interactiveinsightsgroup.com/blog1/social-media-examples-superlist-17-lists-and-tons-of-examples/

http://www.davidmeermanscott.com/documents/Viral_Marketing.pdf