I do not know how many here are photographers, either professionally or just for fun, but on the current episode of PhotoshopUserTV, they talked about a worldwide photowalk day, and amazingly enough, there is already an organizer for Melbourne. It is only supposed to be about 2 hours of photography, then hanging out at a local place to ooh and ahh over each others shots.
Just thought that I would throw it out there and see if there was any interest.
http://photoshopuser.com/photowalk/
As an update, the location that has been chosen is the Historic Cocoa Village area. More information can be found here: http://photoshopuser.com/photowalk/city/melbourne.html
Currently 20 people have registered, with a max space of 50.