For those who monitor ADSB traffic. 'HBAL287' is in the Geelong area tracking approximately MEL to SYD via the Y59 jet route at 30 knots FL640.
Five years into the project, the balloons are being launched in volume and regularly last over 100 days at altitude. Sri Lanka and Indonesia have committed to use them for non metro internet coverage.
I expect ATC to provide traffic separation if one makes an unplanned descent.
Google Loon update
CG