In Part I of this two part screencast, Microsoft Federal Developer Evangelist Marc Schweigert demonstrates the basic concepts used build a mashup application using the Virtual Earth map control and AJAX style programming. In Part II, we’ll build the same solution using ASP.NET “Atlas.”This screencast was inspired by various tutorials and walkthroughs from the following:http://spaces.msn.com/virtualearth/blog/http://blogs.msdn.com/jhawk/http://viavirtualearth.com/You can learn more about programming the Virtual Earth map control at http://msdn.microsoft.com/live/. The source code for this screencast is available here. Don't forget to check out the Federal D&PE blog at http://blogs.msdn.com/federaldev/. -Marc