Richfaces JSR-301 bridge can be used with a any compatible implementation ( for example, MyFaces implementation). Simply put the following into web.xml :

    <context-param>
        <param-name>javax.portlet.faces.BridgeImplClass</param-name>
        <param-value>org.apache.myfaces.portlet.faces.bridge.BridgeImpl</param-value>
    </context-param>