If you are searching for some simple examples to understand and write WS-Security stuff (UsernameToken, Timestamp, Signature or Encryption) actions. I filed a jira task on JIRA, made some examples and Dan committed them in the svn. You can get them in CXF 2.2.3 distribution.
You can check the following (all included Timestamp action):
To get more detailed description about how it all works you can read this Configuring CXF for WS-Security... . I hope your initial queries, doubts while creating and understanding startup examples of WS-Security using CXF and WSS4J will be answered there :)