Protobuff example/articles

Google's site has some good documentation on various aspects of protobuf:
Developer Guide: https://developers.google.com/protocol-buffers/docs/overview
Language guide: https://developers.google.com/protocol-buffers/docs/proto
Javadoc: https://developers.google.com/protocol-buffers/docs/reference/java/index
Generated class file: https://developers.google.com/protocol-buffers/docs/reference/java-generated

Below is the best tutorial/sample program I could find and it is from Google's site:
https://developers.google.com/protocol-buffers/docs/javatutorial