Clone of Popsugar.com

Need a clone of popsugar.com. Well not exactly a clone, this is specifically what I want to do: I am familiar with using wordpress and want to create multiple blogs on different domains with a social network type community for all the blogs. Popsugar has the community network that is used throughout each of their websites. I need a similar social networking system to input throughout my blogs. I need a social network cms that could be used with one installation that will work across multiple blogs on different domains. So that a user is able to use the same profile across all the blogs. A Community system like [login to view URL] and [login to view URL] I would also a products section like on [login to view URL]