That depends how you define the Microsoft campus. The Mesh I was told about was innovative and amazing, and predicted great things for the future. The Mesh that I got to download was an overcomplicated file synching application. Hence, the fantasy Mesh demonstrated here at C9 is my pick for most innovative. The CTP or beta or whatever it was that us normal people got to use is not only not innovative, there are at least two products from Microsoft itself that do what it does, only easier.