Just because Australians would be on at those times doesn't mean that they are Australian. If you could get an active petition going, you might be able to rack up support.

But seeing as how you've yet to prove that they are Australian and want such a server or that they are having difficulty with the current listserver setups, there's no reason to do it.

And for the record, lots of people have asked for the list server in the past, and many of them came out empty-handed and disappointed. You're probably no exception.