I was at the recent Assessment Centres in Sydney for Casual Cabin Crew and they were jointly run by a company called Altara Resources and Jetstar.
Altara are employing as previously stated in this thread on behalf of Jetstar casual cabin crew. They were all really nice - its seems like it's a pretty new concept.
All the figues regarding wages etc - $20.55 per hour + a flight allowance was also confirmed amoungst other general wage and condition info.
It seems casuals will have to list 15 available days per month including 2 weekends (4 weekend days) and recieve a minimum of 50 hours a month but potentialy more if you want it.