Quantities are limited, and it seems that in Australia the new tablet will at least initially be sold only online.
Three models are initially offered: 32GB ($559), a 32GB with black Touch Cover ($679), and 64GB with black Touch Cover ($789).
These prices are slightly higher than those charged in the US: converting from $US to $A and adding GST gives $534, $641 and $748 respectively.
Touch Covers will be available separately in black, white, magenta, cyan and red at $139.99, but at this stage it is not clear whether all five will be sold in Australia.
There's also the $149.99 Type Cover which includes a keyboard.
Surface With Windows RT will go on sale in Canada, China, France, Germany, Hong Kong, the United Kingdom and the United States on the same day.
Microsoft's new tablet weighs approximately 0.68kg and measures 27.5 by 17.2 by 0.9cm.
Hardware features include an Nvidia T30 processor, 2GB of RAM, a/b/g/n Wi-Fi, Bluetooth 4.0, front and rear 720p video cameras, two microphones, stereo speakers, light sensor, accelerometer, gyroscope and compass.
One the software side, there's Microsoft Office Home and Student 2013 RT Preview (upgradable viua Windows Update once the final version is released) plus Windows Mail and Windows Messaging, SkyDrive, Windows Internet Explorer 10, Bing, Xbox Music, Xbox Video, and Xbox Games.
There's no further indication from Microsoft of a release date for Surface With Windows 8 Pro - that tablet is still shown as 'coming soon'.