For now : IBM has technology preview of EJB 3 support as an extension to its websphere 6.x i think . BEA has a technology preview of EJB 3 support in weblogic 9.2 . Oracle has full support of EJB 3 in Oracle application server 10.1.3.1.0 Jonas has preview of EJB 3 support Glassfish is full Java EE 5 application server. and the list continue. all application servers that have a preview will have ejb 3 support(imho).