We require a PHP + mysql (+perl/ruby) social network site to be developed which will allow users to share media. The site requires user registration, log in, activity tracking, profiles and notifications.
Users need to be able to post content such as videos, images, and posts. Then other users will need to be able to vote up or down such content and add replies. Top rated content needs to be listed in side bars.
The site will also need to be flexible for add on features to be added in the future.
This is just a basic structure. Please provide a rough quote for a php system that can accomplish this task.