This document summarizes GlassFish and Java EE, including:
1. GlassFish has over 200 new customers in 2009 and over 24 million downloads since 2005. It is best for lightweight web applications while WebLogic is best for transactional Java EE applications.
2. GlassFish and WebLogic benefit each other, with GlassFish being the open source Java EE platform and WebLogic the commercial platform integrated with Oracle products.
3. GlassFish is the "scout thread" for Java EE standards and drives innovation, while WebLogic implements standards after GlassFish to ensure alignment. GlassFish 3.1 will include clustering in 2011.