just a depends, yet, can't get the bridge to work, and still wondering why jgroups is needed when we change the DS.
Changing the datasource should be trivial.
Just need to update it in xxx-persistence-service.xml.
There's no need to change anything related to jgroups
Regarding your jgroups issue, take a look at this http://www.jboss.org/index.html?module=bb&op=viewtopic&t=116217 thread.
I suspect your making the same mistake (trying to enable clustering in a non clustered installation)
Yep :) Thanks :D