Web 2.0 tools are more and more prevalent in organizational life, and this chapter identifies their multiple influences on knowledge sharing practices, as well as the main challenges of the social turn in knowledge sharing. Indeed, it is argued that social capital, a key concept from social sciences that recognizes the benefits practice derived from connections between people, also plays a role in the context of renewed (i.e. based on Web 2.0 technologies) knowledge sharing practices. Therefore, this study provides an analysis of the influence of social capital in leveraging knowledge sharing in a Web 2.0 context. Finally, using secondary data, this research details a specific case to illustrate how employees can benefit from new forms of knowledge sharing that rely on interactive tools and their social capital.