The collaboration wars are heating up, and once again, IBM Lotus and Microsoft are the dominant players. Driven by the need to better manage unstructured information for business benefit and risk mitigation, collaboration platforms like IBM Lotus Notes and Microsoft's SharePoint are uniquely positioned to help information and knowledge management (I&KM) professionals build collaboration applications. The differences between the platforms, as well as your existing skills and technology investments, will determine the right choice for your organization. For many, Notes and SharePoint may live side by side for the foreseeable future.