Social Network Site Wanted

We're looking to create a social networking site similar to Ning ([login to view URL]), with the following features and technologies: * User-created blogs * User forums * Friends lists * User-created profiles * Photo sharing * Music file sharing * Members * Invitations to join network * Flash based music player * Global and per-page CSS throughout * PHP 5.2.2 code * MySQL database We prefer a social networking system that has already been created and extensively bug tested (important!). No off-the-shelf software! Providers with high ratings preferred. PM us with links to previous social networking software.