Victorian Opera Audition

Hi all, I am wanting to audition for the Victorian Opera in late November 2008. I have submited an application for both the chorus and the young artist development program. Just wondering if anyone has auditioned for this before and could tell me what the audition will entail? I have never auditioned for an opera company before so would really appreciate any advice whats so ever! Do you know how many songs are required? Do they have to be aria's or are art songs ok? Thanks so much!! Louise