Podosphere is a term used to describe the collective podcasting social network or community. The term podcast, to which it refers, was selected by the New Oxford American Dictionary as the "word of the year" for 2005. http://www.prnewswire.com/cgi-bin/stories.pl?ACCT=104&STORY=/www/story/12-05-2005/0004228195&EDATE=. Most likely derived from the term blogosphere, used to decribe blogs, it seems to have been first coined by podcaster Steve Gillmor http://blogs.zdnet.com/Gillmor/index.php?p=5 during the opening session on podcasting of the Bloggercon III conference.