Hey that is interesting. I guess Google Earth creates a .kml file which contains the location details, then zips it to a .kmz file for emailing etc. Google Earth unzips the .kmz? However, as long as it takes people to the location in Google Earth.
Nice rain at the moment - going to clear the air nicely, clear tonight, dry out tomorrow giving us Fri/Sat/Sun nights with glorious observing! Any complaints about Melbourne weather now?