Your post is a bit unclear, but by this anonymous wrote : What I care about the most is speed in a clustered environment I don't have a need for distribution yet neither. I assume you mean your primary concern is performance of your application when running on a cluster. In this case you should certainly use EJB3 as it's more performant than POJOs on a cluster (Seam POJOs work fine, but we haven't put time into optimizing this as EJB3 has). View the original post : http://www.jboss.com/index.html?module=bb&op=viewtopic&p=4099208#... Reply to the post : http://www.jboss.com/index.html?module=bb&op=posting&mode=reply&a...