Folks,
I've just added some additonal doc at http://community.jboss.org/wiki/JBossWS-StackCXFUserGuide .
In particular see some suggestions / warnings regarding effectively using Bus instances in-container.
Still a work in progress, but I've also started a FAQ page regarding JBossWS integration on AS7: http://community.jboss.org/wiki/JBossWS-AS7FAQ