Contrast this with the ruby stack you might be running MRI, YARV, Rubinius for your VM, and then for your web framework you might be running rack, sinatra, etc. Thus when someone makes their stack OpenBSD + YARV + Sinatra + Active Record it's newsworthy as the non-standardization likely created some kind of interesting issue they needed to solve. This stuff doesn't happen on the MSFT side of things. If someone says they are doing a MSFT start up the only real question about their stack is LINQ-to-SQL / ADO.NET entities / nhibernate. I already know that the rest of their stack is going to be Win2k(3|8)R2 + IIS + ASP.NET + SQL Server and it's going to be written in C#.
I was considering doing an Win2k8R2/F#/MVC/nhaml/LINQ-TO-SQL start up but my market isn't tech guys so any blogging I did about my unique stack would attract people who wouldn't be interested in the startup.