We've just published the schedule for the weekend at http://hackfest.openaustralia.org/schedule. Doors will open at 10:30am each day and run through till 8pm.
We also have direct hacking sessions covering setting up your own OpenAustralia VM so you can start hacking (Matthew Landauer + Henare Degan); creating a web mashup to put data on a map (Pamela Fox), and making things mobile (Rob Manson).
At 5pm each day we'll have lightning talks - a chance for you to show off what you're working on.
All these talks will take place in one of our larger rooms - but we'll have a variety of smaller spaces available for free hacking sessions, BoF sessions - or even your own spontaneous presentations.
Lunch (and afternoon tea) will be provided by Google, and there are plenty of local pubs and restaurants to head to for dinner.