Pacer, when I went on to the Air Asia site to make a test booking to Oz, I was only offered 1 destination ex STN and that was KUL. I don't recall seing anything suggesting the possibility of through travel to Australia. If booking seperate flights with these types of carrier it is always prudent to give yourself more than adequate connecting times. I have travelled to ATL with a legacy carrier and onward with a loco carrier. I gave myself almost 7 hours for the connection (which is still not a guarantee, but reduces stress levels).