Flows of information, services and goods are not confined to an organisation’s internal structure, but today face a more distributed environment both in terms of time and space. Mergers and acquisitions imply that one and the same organisation no longer resides in one geographical location, and neither does it have a uniform IS/IT architecture. Web Services are one rather recent approach to obtaining increased interoperability between existing systems. This paper is focused on what business values organizations can achieve using Web Services, Results show ten such values, but also points to challenges that need to be addressed.