The example files that are included in JBM:

[ldimaggi@ldimaggi JBM_1.4]$ find . -name *persistence-service.xml -print
./jboss-messaging-1.4.0.SP1/examples/config/postgresql-persistence-service.xml
./jboss-messaging-1.4.0.SP1/examples/config/hsqldb-persistence-service.xml
./jboss-messaging-1.4.0.SP1/examples/config/mssql-persistence-service.xml
./jboss-messaging-1.4.0.SP1/examples/config/oracle-persistence-service.xml
./jboss-messaging-1.4.0.SP1/examples/config/mysql-persistence-service.xml
./jboss-messaging-1.4.0.SP1/examples/config/mysqlcluster-persistence-service.xml
./jboss-messaging-1.4.0.SP1/examples/config/sybase-persistence-service.xml
./jboss-messaging-1.4.0.SP1/examples/config/db2-persistence-service.xml

Are not in EAP 4.3 alpha

[ldimaggi@ldimaggi EAP_43_alpha]$ find . -name *persistence-service.xml -print
./jboss-eap-4.3/jboss-as/docs/examples/jms/null-persistence-service.xml