This week's book giveaway is in the OCMJEA forum. We're giving away four copies of OCM Java EE 6 Enterprise Architect Exam Guide and have Paul Allen & Joseph Bambara on-line! See this thread for details.
The java.rmi package is the "normal" RMI package which allow applications in one JVM to call methods on objects in another JVM. The javax.rmi package provides an API for applications using RMI over the IIOP or JRMP protocols (in CORBA environments for instance).