Blackberry Visual Voicemail application2

I have a VoIP voicemail server that services business clients and I want to create an application for Blackberry so users can access their VoiceMail from their blackberry similar to the iPhone Visual Voicemail. [To see a demo of the iPhone visual voicemail, click here: [login to view URL] Each business has their own folder inside the server, and than inside each folder, every extension has their own folder too. like in such layout. Company A: /usr/var/enterprise/companyA/mailboxes/ext101/[login to view URL] Company B: /usr/var/enterprise/companyB/mailboxes/ext102/[login to view URL] I will give access to the server so that you can link the Blackberry applications to each user. We shall have a web Interface too [also included in this project, to be created] where we assign each mailbox a different PIN that needs to be entered when logging on to the visual voicemail. Now each user will have to enter first their CompanyName, and then their extNumber, then PIN which will be authenticated to what has previously been stored using the web interface [to be stored in the MySql database. Users using the visual voicemail should have the ability to Listen to messages similar to what is shown for the i-phone, and also Delete by accessing the menu of that application. New messages should appear BOLD on the screen. Users should also have the ability to mark a message New or Read. If .AU cannot be played on Blackberry [I have not found yet any mediaPlayer for blackberry that plays .au] than we shall first automatically convert all .au files into WAV or MP3. Thanks in advance for your bid.