Windows 8 officially goes on sale on October 26, but the updating process continues. Microsoft has tweaked a stack of the built-in Windows 8 apps, including SkyDrive, Mail and Weather.
According to the official Windows 8 blog, the updates will roll out between now and the official launch date. (You'll be able to tell if you have updates as a numeric indicator will appear on the Stores tile on your Start screen.)
The most notable changes are in the SkyDrive app, which will allow you to search within SkyDrive and perform more file maintenance tasks, and in Mail, which now has full IMAP support. Some of the other updates (such as changes to Bing, Travel and Stocks) are likely to make minimal difference to Australia. Hit the blog post for the full list of changes.
Updating our built-in apps for Windows 8 [Building Windows 8]