The released quickstart ejb-multi-server is now available in the public JBoss Developer Framework github.
The example cointain several servers which are administered by a domain controller.
To invoke the EJB's there are web servers and a main ejb application which invoke other EJB's and a standalone client.
To get the sources use:
git clone https://github.com/jboss-jdf
cd ejb-multi-server
mvn clean install