Check out this great site by Frogwatch, all about the advance of toads into the Northern Territory. There's info on a native frog that will prey on cane toads, and some trap designs. www.frogwatch.org.au/canetoads/index.cfm
Supported by the Natural Heritage Trust, Fitzroy Basin Association, Waterwatch Queensland, Port Curtis Catchment Working Group (Calliope Landcare), and a variety of local industries and volunteers.