- Visual Studio code name "Whidbey" (2004). This release of Visual Studio and the .NET Framework will offer innovations and enhancements to the class libraries, common language runtime (CLR), programming languages, and the integrated development environment (IDE). In addition, this product will provide deep support for SQL Server code name "Yukon" by enabling developers to write stored procedures using managed code.
- Visual Studio code name "Orcas" (2005). This version of Visual Studio and the .NET Framework will provide tools support for the Windows operating system, code name "Longhorn."

http://msdn.microsoft.com/vstudio/productinfo/roadmap.aspx
MSBuild is the [extensible, scalable, transparent] next generation build engine and platform for Visual Studio .NET. Many of our sharpest PMs, developers, testers, and yes, even writers, are feverishly working on this project.
more information about MSbuild.exe , there is a webcast about this tool:
http://msdn.microsoft.com/msdntv/episode.aspx?xml=episodes/en/20040122VSNETAK/manifest.xml
that's a limitation of the version.
Thanks Susan First!
The Traditional Chinese New Year is coming around the corner, Happy Chinesee Year to you all:-D