Facebook have unveiled
0.facebook.com - a version of the site that is free traffic on mobile devices.
It's free: Thanks to the help of mobile operators we collaborated with, people can access 0.facebook.com without any data charges. Using 0.facebook.com is completely free. People will only pay for data charges when they view photos or when they leave 0.facebook.com to browse other mobile sites. When they click to view a photo or browse another mobile site a notification page will appear to confirm that they will be charged if they want to leave 0.facebook.com
Australia is not in the current list, but there's a footnote at the bottom that says "Soon, 0.facebook.com will also be available from the following operators: Telstra in Australia..." - indicating that Australians on (some?) Telstra mobile services will soon have unmetered access to Facebook.
That's pretty good news for Telstra-based Facebook readers, though note you will still get charged if you view any photos - thus making the whole thing somewhat less useful. ( Don't forget to 'Like' us!