Collaborative systems and methods are used in companies to support innovation and management of new ideas. The aggregation of innovation-related information from a community of users is a non-trivial task that requires the use of specialized collaborative systems and methods. In this paper we explore the use of Information Aggregation Markets (IAMs) for community-based idea management and present IDeM, a novel software system that is used for generating and evaluating new ideas utilizing the concept of IAMs.