Currently, GlassFish 3 is under active development, in parallel with the Java EE 6 standard. Like the previous versions, GlassFish 3 is being developed not only as a Java EE reference implementation, but also as an application server that delivers high performance and availability. In addition, a lot of new features were introduced into GlassFish 3 with the goal of making GlassFish more flexible, customizable, and to an extent, more "fun" to work with. In this section, we highlight several essential features of GlassFish 3.
This section highlights several new features introduced in GlassFish 3. For a more complete description of the features of GlassFish 3, you can refer to the GlassFish 3 Prelude Release Notes, located at http://docs.sun.com/app/docs/doc/820-4494.