One of the key use case scenarios that I have personally run in to is...what happens when I wish to add RichFaces to an existing Java EE application.
For instance, lets say that I have started using the Java EE Web Project in JBoss Central (JBDS) or the Blank archetype at Maven Central, how do I achieve the following:
1) update my pom.xml to include the additional dependencies
2) make sure any needed JBDS/Eclipse facets are enabled
3) update my .xhtml to include RichFaces libraries