When you first visit the site, you will see the whole of Australia. You'll also notice some once-only information pop-ups, as well as a tooltip that follows your mouse around the map. Please keep the mouse still and read the contents of the tooltip - it will disappear after you read it!
The map works just like a normal Google Maps page: you can pan and zoom. If you pan around or jump to a specific location (covered later), the previous map view is stored in the 'Map Navigation History' (like your 'previous/next' browser history). Simply click 'Earlier', 'Back', 'Next' or 'Latest' to jump through you navigation history. If you are at an earlier point in the history and move the map or navigate somewhere else, all future points in the history will be erased (just like what happens in your web browser).
The 'spench.net' logo is actually a menu. You'll find some handy links inside:
Please pay attention to the status bar. It will inform you of what RFMap is doing, how many sites are loaded, what filters are active, and various other stats.