Some articles about recently release of Java EE 5 (Sun has removed "2" from Java's name) and EJB 3.

Introduction to the Java EE 5 Platform
http://java.sun.com/developer/technicalArticles/J2EE/intro_ee5/

Migrating JDBC Data Access Objects to use EJB 3
http://www.theserverside.com/articles/article.tss?l=MigratingJDBC