Have you heard of neo4j? http://neo4j.org/ http://neo4j.org/ It's a graph database. I haven't used it but only attended a presentation by one of its developers

Have you heard of neo4j? http://neo4j.org/ http://neo4j.org/ It's a graph database. I haven't used it but only attended a presentation by one of its developers, yet it seems to make a lot of sense. :)