1) Yes. 2) Your stuck with one JSF impl but not component lib (but you may well find that they aren't that compatible!) - I know that a target of Trinidad is that it will be completely compatible with Tomahawk. And Seam's seam-ui , seam-pdf and seam-mail are component libraries and will (mostly) play nicely with any other component set. I use a couple internally as well (JSF versions of DOJO and support components). View the original post : http://www.jboss.com/index.html?module=bb&op=viewtopic&p=4006811#... Reply to the post : http://www.jboss.com/index.html?module=bb&op=posting&mode=reply&a...