I played a bit around with YAML, here my results. I have used the Java implementation snakeyaml. Unfortunately I have not found a implementation that use Java annotation for mapping between YAML and Java Bean Objects.
The Java bean code, for the configuration:
And here a small test which use snakeyaml to load the YML file:
There is also a cool plugin for YAML editor support in eclipse called yedit, here a screenshot:
Links: