Social searching--finding items based on networks of social relationships--represents a core capability for discovering critical content in the digital age. We need to combine basic search activities of content-based retrieval technologies with expertise and experience. We need to incorporate the explicit expertise of thematic mapping and intelligent classification together with advanced retrieval techniques such as dynamic category drill-down, federated searching, and parametric searching. We also need to focus on personal behavior by incorporating experience, experts, and communities of interest.