Migrating from Oracle OC4J to Glassfish v2.1

We are involved in a project to migrate a J2EE infrastructure from OC4J to Glassfish v2.1. The applications running on OC4J are based on EJB and JSF (sun impl + tomahawk) and have successfully be migrated with little changes. We new stack are using is Apache 2.2, mod_jk and Glassfish v2.1.

So far, so good!