I've heard it is a full contact style, but I've never bothered researching what its about. Google gives this as its first: http://www.zendokai.com.au/ZDK Site/Index.htm
Zen Do Kai is a very hard style of karate created in australia I believe, by Bob Jones - it became a very fearsome fighting system at one point, with all of bob jones blackbelts providing security for various venues... i believe it is based on goju, but not totally sure, look at: http://message.geoffthompson.com/cgi-bin/ultimatebb.cgi?ubb=get_topic;f=1;t=000973;p=1 http://www.fightsurvival.com/instructors.html