sorry, i guess i was not specific enough.
there used to be examples such as a4j-include and aj4-selectList that could be accessed from http://labs.jboss.com/jbossajax4jsf/, but i can not find them any more.
Ok, this is another store.
jbossajax4jsf project as well as its very old (not-up-to-date) examples are deprecated (almost).
The demos for the former Ajax4jsf components (now, Richfaces' components) are included into the integrated richfaces-demo.