This week's book giveaway is in the OCPJP forum. We're giving away four copies of OCA/OCP Java SE 7 Programmer I & II Study Guide and have Kathy Sierra & Bert Bates on-line! See this thread for details.
RMI is a method of invoking Java methods over a remote (tcp/ip) interface. EJBs methods are accessed via RMI, but the EJB architecture also supports things like built-in transaction support, resource caching, and other good stuff.
Customer surveys are for companies who didn't pay proper attention to begin with.