What is Java EE 5?

Latest from Sun Microsystems,the name of the Java platform for the enterprise has been simplified. Formerly, the platform was known as Java 2 Platform, Enterprise Edition (J2EE), and specific versions had flavors such as J2EE 1.4. The "2" is dropped from the name, as well as the dot number. So the latest version of the Java platform for the enterprise is Java Platform, Enterprise Edition 5 (Java EE 5).

A quick view on what different technologies it encompasses:

Web Services Technologies
Implementing Enterprise Web Services (JSR 109)
Java API for XML-Based Web Services (JAX-WS) 2.0 (JSR 224)
Java API for XML-Based RPC (JAX-RPC) 1.1 (JSR 101)
Java Architecture for XML Binding (JAXB) 2.0 (JSR 222)
SOAP with Attachments API for Java (SAAJ) (JSR 67)
Streaming API for XML (JSR 173)
Web Service Metadata for the Java Platform (JSR 181)

Web Application Technologies
Java Servlet 2.5 (JSR 154)
JavaServer Faces 1.2 (JSR 252)
JavaServer Pages 2.1 (JSR 245)
JavaServer Pages Standard Tag Library (JSR 52)

Enterprise Application Technologies
Enterprise JavaBeans 3.0 (JSR 220)
J2EE Connector Architecture 1.5 (JSR 112)
Common Annotations for the Java Platform (JSR 250)
Java Message Service API (JSR 914)
Java Persistence API (JSR 220)
Java Transaction API (JTA) (JSR 907)
JavaBeans Activation Framework (JAF) 1.1 (JSR 925)
JavaMail (JSR 919)

Management and Security Technologies
J2EE Application Deployment (JSR 88)
J2EE Management (JSR 77)
Java Authorization Contract for Containers (JSR 115)