While I've not yet seen an official statement confirming whether Australian government will support the second version of the W3C's Web Content Accessibility Guidelines (WCAG 2.0), there has been a report released by UsabilityOne reviewing 12 Federal Government websites against the guidelines.
The Accessibility Industry Report found a number of issues across the sites that would need to be addressed for them to be WCAG 2.0 compatible.
To quote UsabilityOne,
None of the websites audited adhere to all criteria in the latest accessibility guidelines.
Have you looked into making your site compliance with WCAG 2.0?
Or are you waiting for the official government position?