Leadsled, thanks but I have already been researching ADS-B. For anyone who is interested here is a link, have alook at the aircraft types in the graphics.
. .Only kidding.. .<a href="http://www.airservices.gov.au/pilotcentre/projects/adsb/adsb.htm" target="_blank">http://www.airservices.gov.au/pilotcentre/projects/adsb/adsb.htm</a>
I still don't think Billy Weekend Warrior. .(worrier) or farmer Bill at Kickacanalong Station. .will be to fussed about MORE radio gear in his 1969 Cessna, Jabiru, Victa...
Remember that COMPULSORY transponders were going to be THE answer for TCAS aircraft.
I think the point is if ADS-B takes 10 years to implement ( think back to NAIPS around 1991) what do we do in the meantime?