Existing research on B2B iMarketplaces (and the intermediaries which operate them) has tended to focus on viewing US iMarketplace web sites or conducting case studies. This paper builds upon this work by conducting a survey of the total identifiable population of Australian B2B iMarketplace intermediaries to determine whether the classifications of such iMarketplaces provided in the literature apply in the Australian context. The paper also provides a preliminary classification scheme which is intended to provide researchers with a framework for studying and describing the evolution of B2B iMarketplaces over time.