There is and will not be any airline in Oz named Jetstar! Jetstar currently, and for the foreseeable future will be a trading name of Impulse Airlines Pty Ltd(AOC
holder), a wholly owned subsidiary of the Qantas Group.
The reason for pointing this out is that there will not be a large take up of new staff to start a new airline, as they are already in place! Yes Impulse will expand when the A320 arrive,(July 04 for the first one, I believe) not much before then.
Impulse is still a fully functioning airline, except for no reservations system. This is being put in place and it looks like it will be, at least to some extent, a resurrection of the old Impulse one, but that is not certain.