What is GlassFish v3 Prelude? How does it differ from GlassFish v2?

GlassFish v3 Prelude is a modular, lightweight Web 2.0 development and deployment platform. It is a stable, fully tested, production ready release, and a step towards GlassFish v3 and full Java EE 6 certification. Key features include:

• An OSGi-based modular architecture
• The ability to redeploy Java web applications without losing session state
• Java EE 6 preview technologies
• Native JRuby deployment

For more information about GlassFish v3 Prelude, see the comparison between GlassFish v2 and GlassFish v3 Prelude.