Galera, é o seguinte , criei um projeto no eclipse utilizando jsf 2.0, inclui as bibliotecas:
commons beanutils 1.7.jar
commons collection 3.1.jar
commons digester 1.7.jar
commons logging 1.0.2
jsf api.jar
jsf impl.jar
jstl.jar
richfaces api 3.3.3 final.jar
richfaces api 3.3.3 final.jar
richfaces impl jsf 2-3.3.3 final.jar
richfaces ui 3.3.final.jar
standard.jar
segue abaixo o meu .xhtml
<h:form>
<rich:dropDownMenu>
<f:facet name="label">
<h:panelGroup>
<h:outputText value="File"/>
</h:panelGroup>
</f:facet>
<rich:menuItem submitMode="ajax" value="New">
</rich:menuItem>
</rich:dropDownMenu>
</h:form>
segue abaixo meu arquivo web.xml
<display-name>MODAL</display-name>
<welcome-file-list>
<welcome-file>index.html</welcome-file>
<welcome-file>index.htm</welcome-file>
<welcome-file>index.jsp</welcome-file>
<welcome-file>default.html</welcome-file>
<welcome-file>default.htm</welcome-file>
<welcome-file>default.jsp</welcome-file>
</welcome-file-list>
<servlet>
<servlet-name>Faces Servlet</servlet-name>
<servlet-class>javax.faces.webapp.FacesServlet</servlet-class>
<load-on-startup>1</load-on-startup>
</servlet>
<servlet-mapping>
<servlet-name>Faces Servlet</servlet-name>
<url-pattern>*.jsf</url-pattern>
</servlet-mapping>
<context-param>
<description>State saving method: 'client' or 'server' (=default). See JSF Specification 2.5.2</description>
<param-name>javax.faces.STATE_SAVING_METHOD</param-name>
<param-value>client</param-value>
</context-param>
<context-param>
<param-name>javax.servlet.jsp.jstl.fmt.localizationContext</param-name>
<param-value>resources.application</param-value>
</context-param>
<listener>
<listener-class>com.sun.faces.config.ConfigureListener</listener-class>
</listener>
<context-param>
<param-name>org.richfaces.SKIN</param-name>
<param-value>blueSky</param-value>
</context-param>
<context-param>
<param-name>org.richfaces.CONTROL_SKINNING</param-name>
<param-value>enable</param-value>
</context-param>
<filter>
<display-name>RichFaces Filter</display-name>
<filter-name>richfaces</filter-name>
<filter-class>org.ajax4jsf.Filter</filter-class>
</filter>
<filter-mapping>
<filter-name>richfaces</filter-name>
<servlet-name>Faces Servlet</servlet-name>
<dispatcher>REQUEST</dispatcher>
<dispatcher>FORWARD</dispatcher>
<dispatcher>INCLUDE</dispatcher>
</filter-mapping>
</web-app>