Well that was a good time to put the bins out.
As soon as I stepped out into the street (9:0gpm), there was a fireball moving NW to SE fast about 45 degrees elevation - I'm in Kirribilli so it would have gone over most of the city. After about two seconds it separated into chunks and then disappeared after another half second.
Anyone else see it? Or fancy giving me odds on it being a meteor rather than a rogue firework?