Cycling in victoria and queensland, Australia

Hello,

we're planning a trip from Melbourne to Cairns in Australia.
8 February 2012 - 8 April 2012.

As I'm a cycling amateur at home, I'd like to do some training once in a while along the road.
Does anyone have good advice on intresting trips along this road?
And can you tell me what are good maps/road books?

Also good cycle renting adresses are more then welcome.

Thanx
Peter