This is something interesting that someone posted on my forum.
It looks like it really might be the case too:
Zero results for inurl:com.au, but plenty of results (as expected) for inurl:net.au and inurl:edu.au.
Google.com.au isn't even in the index: site:www.google.com.au. And even more confirmation is every .com.au domain (including Google's) has a PR0 right now.
If it's an April Fool's joke, I don't think the Australian webmasters are having a good laugh. heh
