first reply from an aussie?? ok, well i live in melbourne..
I recomend:
the MCG (melbourne cricket ground)
Federation Square
Eureka Tower
Rialto
Phillip Island
Go to mt.bullar to see the snow
Come to Frankston, where i am, we have a nice beach.
go down the great ocean road
see the 12 apposils.
IMAX Theatre Melbourne largest movie screen in the world!
Melbourne Aquarium lots of fish
Melbourne Zoo lots of animals
Queen Victoria Market, freaking awesome market
there are lots of things to do in melbourne.
motorsport museaum at bathurst thats a long! way from melbourne, or a fair way from sydney, im going to the Bathurst 1000 this year, gonna be great!!!
if you need anymore info, just ask