This is the thread's initial revision.
I just removed a bit of recently added text. Sorry. Don't want to start an edit war, or something, but I do believe this page - the central KDE on Windows landing page in the wiki - should be concise and to the point. People coming here can be assumed to know why they are coming here, and don't need a discussion of Linux vs. Windows. They need quick access to the most important info.
Also, please avoid adding redundant links (to IRC, widnows.kde.org, mailing list). I did add dedicated subsection "Contact", now, to make it easier to see this info is already there.