If by community development you are referring to the NetBeans developer collaboration plugin, it is not covered in the book since it focuses in Java EE APIs and technologies.
Any database with a JDBC driver can be supported by NetBeans, out of the box it includes drivers for MySQL, PostgreSQL and JavaDB/Derby. The book explains how to set up NetBeans to integrate with RDBMS systems not supported out of the box.
Regarding application servers, NetBeans supports several popular application servers and servlet containers such as JBoss, Tomcat, Weblogic, Websphere and, of course, GlassFish.
Author, <a href="http://www.packtpub.com/java-ee5-development-with-netbeans-6" target="_blank" rel="nofollow">Java EE 5 Development with NetBeans 6</a>