In case anyone missed the recent web casts on Web service security that Don Smith, Ron Jacobs, Dwayne Taylor and Mark Fussell have been doing take a look. There are three web casts covering Kerberos, X.509 Tokens or UsernameTokens. For more information including links to the webcasts take a look at Don's blog - http://blogs.msdn.com/donsmith/archive/2006/01/14/512820.aspx...