Not to go too far, but Microsoft is probably used by most people out there.
Miguel de Icaza
Most people know that there is this partnership between Yahoo and Microsoft on search.
Ross Levinsohn
Microsoft runs the world's biggest blogging platform, MSN Spaces.
Rebecca MacKinnon
Linux people do what they do because they hate Microsoft.
Theo de Raadt
I'm just an observer of Java, and where Microsoft wants to go with C# is too early to tell.
Dennis Ritchie
Microsoft isn't stupid.
Jesse Schell