A discussion of solutions that make use of .NET Enterprise Servers would not be complete without mentioning integrating wireless applications into the enterprise. Microsoft Mobile Information 2001 Server is a recent addition to the family of .NET Enterprise Servers. Integrating wireless devices involves delivering information to very thin clients. Data aware devices already number in the hundreds of millions. This large population of connected and location-aware devices poses a very attractive target, but delivering location-based services is not an easy task. In these chapters we address how to build a server architecture that is capable of supporting location-aware applications. Most of the content shows you how to deliver core services to mobile applications via XML and SOAP. A Visual Studio .NET solution with a sample application is also included on the companion CD-ROM.