There should be a free quick start guide soon.
Now that RC1 is released, the features are stable.
I don't know when exactly.
The full docs will take longer.
To answer you more directly,
jboss.conf and jboss.jcml are now combined in
But, you can also create *-service.xml snippets or a *.sar archive for hot-deployable configuration in deploy.
For specifics, I suggest you search the forums. In
particular JCA/database config has changed.