Well, I just flew into Sydney from Amman, Jordan on Etihad with a QF flight number from amman to abu dhabi and then again from Abu dhabi to Syd.
Very decent airline and nice to be able to get all my status points, FF points and bonus etc too.
No lounges! Can't use the Etihad lounge in Abu Dhabi as I have no staus with them (flying economy) and there are no one-world lounges in Abu Dhabi. BA uses an "external" lounge with a bunch of other airlines so no joy there...
There is a lounge you can use free if you have a Diners Club card (worth getting a Diners as there are quite a few lounges around the world that it will help get you into).
The RJ lounge in Amman did not give me access. Not sure about this one. I showed then my QF flight number and my SG card, but since the flight was not operated by a OW partner, they denied me access. I may have a case here but it was falling on deaf ears...