While it’s good to read about graph databases, sometimes you just want to sit back, relax and watch the most awesome movie ever made with your name on it… “Mad Max: Beyond Thunderdome” (“two men enter, one man leaves!”)… but other times you just want to a video or two about graph databases!
Neo4j:
The guys at Neo4j have put together a great collection of videos (30 and counting) at http://vimeo.com/neo4j/videos.
Visualization:
Max De Marzi 
Thanks for creating the Neo4J tutorial. What I liked the most was the simple build up to what is Graphical database and the chart that shows the applicability of graphical database to various use cases and industries.
Keep up the great work.