Fun with J2EE

The EJB 2.1 specification looks pretty good although it looks like it doesn't have all of the features of something like JBoss .Net.

http://www.theserverside.com/resources/article.jsp?l=MonsonHaefel-Column1

OnJava has done an overview of the JBoss clustering:
http://www.onjava.com/pub/a/onjava/2002/07/10/jboss.html

Finally, a UML to EJB tool using XDoclet (import using XMI files):
http://sourceforge.net/forum/forum.php?forum_id=192976