Looks like the US have a release date for The Rover DVD.  Not 100% sure if this is gospel, but it’s something to look forward to.  According to Walmart you can preorder Blu-ray + Digital HD and DVD + Digital HD by clicking on the links.

Thanks @FeistyAngel for the Walmart tip.

Aussies can be notified of availability by signing up for notification at EzyDVD here

You can also preorder on US iTunes and Australian iTunes

Updated: Amazon France have the release date for The Rover on Blu-ray & DVD listed as October 13 2014 & both can be pre-ordered.  Blu-ray here & DVD here.

And Amazon.ca have the DVD available for pre-order here.