This document summarizes a study on harnessing Web 2.0 tools for business-to-business marketing. It reviews relevant literature and reports findings from interviews with Finnish industrial firms. The study finds that while Web 2.0 provides benefits like strengthening customer relationships and lead generation, its use for B2B marketing is still low. Common Web 2.0 tools examined include blogs, social networks, online communities, and content aggregators. The major obstacles to Web 2.0 adoption are a lack of understanding of its benefits and concerns about losing control of online discussions.