Andreas Ronge just released version 0.0.7 of Neo4j.rb. See the project page for more information. Highlights from the changelog: added value object stuff to support Rails, made the neo4j engine start and stop automagically.
Neo4j.rb can now be used as a complement or replacement for ActiveRecord in Ruby on Rails. All what is needed is to add the neo4j gem in the rails config/environment.rb file.
Here is an example how to use a Neo4j.rb model in a rails controller:
# creates a empty value object from the node class:
@movie = Movie.value_object.new
@movie = Movie.new
# update the new movie node
# by using the request parameters