BizTalk development on virtual machines has become an essential part of the development process.  The speed with which you can tear down and build up BizTalk VMs means you spend less time configuring environments and more time developing artifacts.  Typically, an instance of one of these environments contains everything (BizTalk, SQL Server, Visual Studio, etc.) running on a single VM machine.  Spinning up a new development environment is as easy cloning your base image.  Occasionally, though, you need a development or sandbox environment that’s a little more than a virtualized BizTalk “island”, of sorts, with everything running on a single VM.