* the 10 minute code-level getting started guide: http://wiki.neo4j.org/content/Getting_Started_Guide
* a full-blown reference example, including diagrams, graph layout screen shots, code walk through etc: http://wiki.neo4j.org/content/IMDB_Example
* the domain modeling gallery, which shows how to model a bunch of domains in a graph db: http://wiki.neo4j.org/content/Domain_Modeling_Gallery
* popular blog post about how to model a social network in Neo4j: http://blog.neo4j.org/2009/09/social-networks-in-database-us...
* how to work Neo4j in python, ruby, clojure, scala & grails: http://wiki.neo4j.org/content/Main_Page#Language_bindings
If you have more questions, feel free go all mailing list on us: https://lists.neo4j.org.
Hope that helps!