Re:Real-world examples of tangible benefits (Score 1)

Any plans for KDE integration, ie QT#? (whether by you, or an entirely seperate project)

There is a Qt# project, which can be used with either DotGNU or Mono.

Independent of that, in the DotGNU project, there is work underway to create a "KDE theme" for DotGNU's System.Windows.Forms.

I'm not aware of any work in Mono that is specifically designed to support KDE integration, and I'd be surprised if there was, since one of the original stated goals of the Mono project was to "help GNOME".