Any Idea on Wicked Ensemble Casting?

Hi guys. I'm new to these forums. My name is Michael, I'm 18 years old and I'm from Victoria. Wicked is is an awesome Musical and its originality is something we need more of in todays Musical Theater. I know a lot of people who hated (Ignorance) Musical theater until they either saw Wicked or listened to the Broadway Cast Recording. I was just wondering, with the announcement of Wicked coming to Melbourne next year, has there been any hint of when casting dates for the ensemble will be? Also, who is set to promote it? I would love to audition for the ensemble. Thanks Michael M-S