If you lodged a paper application tracking progress is not possible online.
You will have to use the contact form on the Immigration site for queries.
Use your full name and passport number and Employers TRN as reference numbers when you do this.
My employer hired an agent to arrange my 457. So far I have submitted all relevant documents and filled the questionaire to them. Done Xray yesterday and it will reach the Immi office by next Friday. And the agent will lodge my application after confirm my report have reach Immi. They say by doing this way (medical report first - lodge later) will have shorter lead time for approval. Is this true? Anyone experienced this before ?