Some of these i've listed before on the previous incantations of this forum:

http://www.fortunecity…twood/indigo/11/index.htm

http://www.cia.com.au/bullack/

http://www.cia.com.au/bullack/rvrtitle.html

Enjoy. :)

A few more layouts built in Australia can be found here
Layout Tours - National Model Railroad Association Inc.

Good modellers, some of these Aussies :!:  :!:

A few in that category on here too :!:  :wink:    

For those into "On3" stuff: http://www.britanniacreek.net/