This week's giveaway is in the EJB and other Java EE Technologies forum. We're giving away four copies of EJB 3 in Action and have Debu Panda, Reza Rahman, Ryan Cuprak, and Michael Remijan on-line! See this thread for details.
Ian J2EE is the enterprise edition. It has more tools and APIs in it for doing things like distributed computing, creating multi-tiered applications, servlets, jsp, rmi, and a bunch more. For all of the details check out the overview on Suns site.