Microsoft has released the source code for "MechCommander 2" under its Shared Source license.
"This release contains all of the source code and source assets required to build MechCommander 2."The intent is to use it with the "Microsoft XNA Build March 2006 Community Technology Preview (CTP)"
"Microsoft® XNA™ Build is a tool which will help game studios manage the growing complexities of their game content builds. We invite you to install this pre-release into a non-production environment to learn more about how XNA Build will reduce development complexities."