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
Welcome to Apache Cassandra 1.0. October 1, 2011 by Roberto Zicari · Published October 1, 2011 · Last modified February 16, 2014
Approaches to Data Modeling in Non-Relational Systems Using Apache Cassandra September 1, 2010 by Roberto Zicari · Published September 1, 2010 · Last modified February 16, 2014