About the proliferation of NoSQL, check out this Changelog episode where "things got a bit rowdy when the panel debated features of Cassandra, CouchDB, MongoDB

About the proliferation of NoSQL, check out this Changelog episode where "things got a bit rowdy when the panel debated features of Cassandra, CouchDB, MongoDB and Amazon SimpleDB and started throwing dirt at everybody else’s favorite NoSQL databases." http://thechangelog.com/post/457259567/episode-0-1-8-nosql-smackdown http://thechangelog.com/post/457259567/episode-0-1-8-nosql-s... This is 6 months old btw.