KPI's Gary Patalsky highly discourages customers from using open source SOA products in enterprise environments (go with Oracle or IBM - you will need their support). But if you are already a JBoss user, JBoss Enterprise SOA Platform 4.3 could possibly be an option. V 4.3 has new ESB (new gateway listeners, a declarative security model, improved web services integration and additional scripting languages) and Rules (Stateful Rules services, decision tables and Rule agent support) features.