Recently released in the US is a min series 'Lawman' which shows him working as a police officer for a few years in a reality TV show. Not sure if it will air in Oz but plenty on you tube?
His aiki credentials are very impressive and there is plenty of action on youtube from films and seminars he has taught at. He has many firsts in aikido for a westerner and legitimate aikikai hombu credentials, currently a 7th dan I think. A big man he does aikido few can replicate.
His public persona, work with law enforcement agencies and biography presented through fictional characters in movies leaves plenty of speculation about him, which is all good for a movie star I imagine. See his filmography and bio here
Recently (2010) he has been teaching aikido to a famous MMA competitor Anderson Silva (see video below)
Hereis an article that followed this session