Some items that explore the potential of folksonomies:
http://www.ariadne.ac.uk/issue47/tonkin/
http://many.corante.com/archives/2005/01/07/folksonomies_controlled_vocabularies.php
http://personalinfocloud.com/2005/02/explaining_and_.html
http://infotangle.blogsome.com/2005/12/07/the-hive-mind-folksonomies-and-user-based-tagging/
http://www.wired.com/science/discoveries/news/2005/02/66456