You could cut the airwaves with a knife ... the Australian metropolitan cities radio ratings are released today. In Brisbane, chances are that Nova 106.9 will continue its tussle with Triple M for overall leadership, 97.3FM will probably win the hearts and wallets of grocery buyers, and 4BC and 612 ABC will battle it out for the talk audience and older demographics. Eyes will be on B105, the former market leader that is trying to reinvent itself with a new breakfast show supported by extensive television and bus-stop advertising and big promotions. More as it comes to hand.