All of my DoD customers use .Net, IIS, and SQL Server. My DoT customer uses .Net, IIS and Oracle. So I DO need Visual Studio to 1. design applications for my customers, and 2. advance the skills needed to support my customers (which must be done on my time on my machine). So again, if Linux can't support VS2010 and SS2008R2 then it is of no value to me at all.