Comment posted the JavaBuilders forum
Swing JavaBuilder 1.1 is out:
Please read our PDF book to get started.
Also, you can view our original JavaLobby article, although it refers to the older 0.3 version.
New in 1.1:
* switch to SnakeYaml for YAML parsing (which results in much more readable error messages)
* changed default file extension to .yml instead of .yaml
* misc bug fixes