Product page: http://www.sun.com/software/products/glassfishv3_prelude/index.xml
Comparison between Sun Java System Application Server 9.1 (GlassFish v2) and Enterprise Server v3 Prelude: https://glassfish.dev.java.net/public/comparing_v2_and_v3.html
Support and services: http://www.sun.com/software/products/glassfishv3_prelude/support.xml
SunSolve knowledgebase: http://sunsolve.sun.com
Resources page (points to articles, blogs, videos, screencasts, FAQs, and many other resources related to Enterprise Server v3 Prelude): http://wiki.glassfish.java.net/Wiki.jsp?page=GlassFishV3PreludeResources
Documentation: http://docs.sun.com/coll/1343.7
Mailing lists and forums: See Search the GlassFish Mailing Lists and Forums for details about accessing lists and forums.
Technical Note: Sun Gathering Debug Data for Sun Java System Application Server
GlassFish community site: http://glassfish.org
GlassFish wiki: http://wiki.glassfish.java.net/Wiki.jsp?page=PlanForGlassFishV3