Until recently little research has been undertaken into the process of eCommerce implementation, especially in relation to the implementation of business-to-business (B2B) relationships. Given the complexity of this process we have, in this paper, endeavoured to contribute to what we perceive as a gap in the body of theory surrounding the implementation process in the extant business-to-business relationship literature. We describe the findings of a series of multiple case studies comprising ten major Australian eCommerce initiators. In addition to confirming our earlier finding of the importance of non-technical factors for the success of the implementation process we also present, through our case studies, the various management and business issues associated with the success or otherwise of B2B eCommerce implementation.