Couchbase customer presentations (LinkedIn, Orbitz, McGraw-Hill, and others.) by Roberto Zicari · Published January 1, 2013 · Updated February 16, 2014 How they are using Couchbase at their organizations. You can view them here: LINK
The Graph DB Landscape and SonesDB September 1, 2010 by Roberto Zicari · Published September 1, 2010 · Last modified February 16, 2014
What’s new in Couchbase Server 2.0 April 1, 2013 by Roberto Zicari · Published April 1, 2013 · Last modified February 16, 2014
Cassandra January 1, 2008 by Roberto Zicari · Published January 1, 2008 · Last modified February 16, 2014