I did a presentation at the MySQL miniconf as part of LCA2007 in January. It was entitled "The 10 Do's and Dont's of MySQL Cluster" and presented some of the knowledge I had learnt in setting up NDB clusters in the real world. Many people treat NDB as just a simple storage engine and can be used interchangably with InnoDB or MyISAM engine types. My talk presents some of the issues I found in simple summary form and why certain details are important when implementing a MySQL Cluster.
Most of the points will appear as common sense to seasoned DBA's and data architects, but many people currently in industry seem to get these points wrong or totally forget them. My talk exposes the problem areas, but also highlights some of the good things that were found when implementing a cluster and how it can perform better.