I think I implemented all the needed interfaces, but I haven't written the deployment code yet. Also my stuff is for the first public draft, I haven't had a chance to look into the latest draft yet.
I think you can deploy your adapter by writing a simple mbean to create the needed objects and hook them up with the appropriate stuff in jboss. There are a couple of tests that do something like this. Ask if you need more help with this.
The deployment system I hope to write will work by combining the ra.xml with a jboss deployment descriptor using an xsl script whose output is some mbean configurations (a *-service.xml file, essentially) that will then get deployed by the mbean deployment mechanism (SARDeployer).