Once you have deployed your resource adapter you can use it as you normally would by looking up the ConnectionFactory and getting a connection from it.
This test case shows how the look up should be done:
http://viewvc.jboss.org/cgi-bin/viewvc.cgi/jbossas/projects/jboss-jca/trunk/deployers/src/test/java/org/jboss/jca/test/deployers/spec/RarTestCase.java?revision=99481&view=markup
We will add more documentation in this area once we hit the Beta phase, but community contributions are always welcome !
As to the inbound part - that part is optional in a standalone environment, so we will take a look later on what we can do. Contributions is also most welcome here :)
Start by checking out our source code
http://docs.jboss.org/jca/developerguide/en/html/building.html
and send us your documentation patches as JIRAs while you are making progress in this area.
We are committed to the embedded use-case as we use it ourselves to actually test the container ;)