Social networks have seen enormous growth over the past few years, providing also a powerful new channel for distributing personalized services. Personalization, however, is exacerbated because social content is scattered across different social networks serving specific human needs and social networkers are particularly reluctant to share social content with service providers, if not under their full control. This paper sketches TheHiddenU, a social nexus exploiting semantic techniques for integrating, profiling and privatising social content, thereby providing the technical prerequisites for personalized brokerage, a new, sustainable business model in the Social Web.