From Peter Neubauer, from who so many Neo4j goodies come!
In a discussion thread on importing, Rick Otten mentions http://symmetricds.codehaus.org/ having the potential:
to feed data from your Oracle (or other JDBC accessible Relational database) into Neo4j – live, as the data changes.
As Peter replies:
Very interesting – I like!
Would love to play around with it. Thanks for the tip Rick!