Great article. I like Neo4J but I have never used it for a customer project - just for personal experiments.<p>In general, NoSQL vs. relational is an interesting tradeoff between the ability to horizontally scale at reasonable cost vs. immediate consistency.
A few more years of forward progress and the noSQL movement will make it to 1959 level technology: <a href="http://en.wikipedia.org/wiki/CODASYL" rel="nofollow">http://en.wikipedia.org/wiki/CODASYL</a>