Following the "open" innovation paradigm leading companies are increasingly integrating customers into their innovation processes as they are the wellsprings of ideas and knowledge about the products. This paper focuses on customer integration into innovation process and how IT can be used to support it. Wikis are described as effective conversational technology for ad-hoc problems with decentralized knowledge sources, meaning that they are one fitting information technology answer to the cooperative Fuzzy Front Ends of innovation processes, particularly their realization phases.