RM,
If you are using Maven to build and deploy your app, you are circumventing the deployment tool in MyEclipse that handles hot-syncing. If this is a feature you need you will need to use the deployment manager from MYEclipse using an “Exploded deployment” format.
As far as how to configure JBoss, I can’t really help there. When you use the deployment tool from MyEclipse with a default JBoss install, everything works fine. I haven’t tried using Maven in a development scenario before so I don’t know how to work that into the equation.