Not the best prices in the world but the travel ranges aren't so bad for some of these, check the link to see them! Bris to Sydney in December for $49 is a fairly good snatch I think!
Adelaide to Cairns $119
Brisbane to Cairns $79
Brisbane to Hamilton Island $69
Brisbane to Mackay $49
Brisbane to Rockhampton $39
Brisbane to Townsville $69
Brisbane to Whitsunday Coast $59
Melbourne (Avalon) to Brisbane $69
Melbourne (Tullamarine) to Hamilton Island $119
Melbourne (Tullamarine) to Townsville $119
Sydney to Brisbane $49
Sydney to Cairns $119
Sydney to Fraser Coast $69
Sydney to Hamilton Island $119
Sydney to Sunshine Coast $59
Sydney to Townsville $99
Nice!