My information is that there will be 4 ground schools in total for this current recruitment drive.
1 will be in Melbourne and 3 will be in Sydney. They are currently working on the Assessment Day in Melbourne as the 787 is due to begin operations out of MEL in October (so this is their priority) with Sydney in the following months.
The Hogan Assessments for the SYD applicants have not been looked at yet thus no invites for SYD applicants at this stage.
Stay positive, no news is good news. Good luck on June 1st to those MEL peeps.