Blog Based CMS Site Design

Looking to create a site that is similar in function to: [login to view URL] Must be CMS based, can be custom or a hack of an opensource platform. Design templates for the look/feel/behavior of each section will be provided, the winning supplier will be responsible for implementing the design into the templates and structure required for the CMS/Blog platform. Elements to be included: Blog Archive User Registration/login User Comments Products, Stores, services, Classifieds (similar to sample site) PHPAds integration