OptiRex - 5:17 pm on Sep 20, 2004 (gmt 0)

Ensure your server is based in Australia and not in the USA etc. The .au may help a little bit to identify to Ozzies that it is an Ozzie URL however, if Google.au operates the same as all the other Googles I work with, the server IP is extremely significant and the actual DOM extension is of little relevance.

And a caveat, this does not necessarily hold true with Yahoo!