Java Servlet 2.5 Spec is now ready. Infact its a maintenance release.The 2.5 specification states Java 1.5 (or Java 5) as the minimum requirement. Some of the new features added in this release are :

• Annotations Support
• Dependency on J2SE 5.0
• Multiple Pattern mapping in web.xml

The latest containers that support Servlet 2.5 specification are Jetty 6 Server and Sun GlassFish server.

Read more about the new features at javaworld.