Microsoft SQL Server 2008 R2 introduces StreamInsight, a comprehensive platform for building event-driven applications. While typical relational database applications are query-driven, event-driven applications are characterized by continuously arriving new data, continuous processing of the incoming data, and oftentimes also latency requirements that make it impractical to store the data in a relational database before processing it. Event driven applications occur in many different industries, including manufacturing, oil and gas, utilities, financial services, health care, retail, web analytics, and data center monitoring. This session provides an overview of Microsoft StreamInsight, the main customer scenarios, the product architecture, and its integration into the Microsoft stack. As part of the session, we walk you through demos for different usage scenarios and illustrate how you can build event-driven applications with Microsoft Visual Studio 2010, Microsoft .NET Framework 4.0 and StreamInsight. We also provide a brief outlook on new and upcoming features for the next version of StreamInsight.