We spent a lot of time trying to come up with something really awesome and a bit different for our open day, we're calling it an "Open Day Without Walls". Basically, it's a whole series of interesting things around Canberra for you to check out. For example, the local hackerspace is going to hold an open morning where you can come along and see what they get up to.
We also intend to run this as a bit of an “unevent”. We are calling for people who think they have something interesting to show our delegates to sign up at: https://lca2013.linux.org.au/wiki/Open_Day