Front and back end development needed for Conferencing Syste

We are looking to duplicate a system similar to freeconference.com. VoIP and Asterisk experience is a plus. We prefer someone who has already coded such a project that can customize the existing code for us. Here are the features we would like: 1. Front end website design of all graphics and logo. 2. Back end coding using PHP for customer member area and admin management. 3. MySQL DB that can be replicated using a number of machines for redundancy. 4. Outlook conference scheduling using Outlook toolbar. Toolbar needs to be coded. 5. Tracking of every minute used per user with reporting functionality. 6. Ability to invite friends to join and create their own conferences. This system needs to depend of viral marketing to grow. 7. App integration with Facebook. 8. Contact integration with Hotmail, Gmail and Yahoo mail address books. Feel free to email with questions. Thanks! -Hooman