Wikis have emerged as easy and flexible tools for accessing and sharing knowledge on the internet and within organizations. Due to their highly collaborative nature, users can typically modify and create content without any access restrictions since these are replaced by social practices. On the other hand, due to the lack of central guidance, knowledge sharing is driven by the individual choice of contributors. We claim that – especially in enterprise settings – the lack of guidance for content creation is a major problem. We therefore analyze search and knowledge sharing in current Wikis. To improve knowledge sharing, we present the Woogle concept, which introduces “Social Search” and “Need-driven Knowledge Sharing” into Wikis. We describe our prototype implementation Woogle4MediaWiki and results from initial evaluation studies.