Yes, this is something i have spent a long time thinking about - meeting others but then i keep remembering the fact that everyone who emigrates is in the same boat and there are loads in Oz obviously, so it can't be that hard to muck in with your neighbours and get chatting.
Also there are loads of organisations/groups that can be joined, i.e. i am Scottish and i know there are loads of Scottish community groups out there screaming for people like me to join with all new Scottishness. My kids can get involved with these kind of things too.
Whatever your ancestry/interests are, there are plenty to join in Oz.