Of topic, but I sometimes wonder whether the power of Australian FM stations could be reduced especially in crowed markets and that might allow more stations on the band. Do the commercial stations in Sydney really need to be 150 Kw ERP. Do ABC stations in Coffs Harbour or Mt Dowe need to be so strong that they block stations using those frequencies in SEQ?
AFAIK the commercial stations in London are 4Kw ERP (could be wrong though). You also see similar things in some US cities. NYC stations are 6.7 kW etc from Empire State Bldg. Even the large LA market that is difficult to service because of all the canyons etc has KOST on 11.5 Kw, KCBS 27.5 Kw.