I added NearMap to the list of imagery presets in Potlatch 1.2f which'll hopefully be live soon. This makes mapping Australia slightly easier:

Unfortunately due to a Potlatch bug the full detail of NearMap isn't available in it. It's a bit harder to set up JOSM for NearMap but the resulting detail is insane, here are some people on the beach on Rottnest Island at zoom 23 in JOSM: