KDE On Wayland Won't Happen Anytime Soon
Proper support for running the KDE desktop on Wayland still won't happen for a while.
In talking with Martin Gräßlin today at XDC2012 in Germany, he shared a brief update on the plans for running KDE on Wayland. Gräßlin, the lead maintainer of KDE's KWin compositing window manager, originally hoped for initial Wayland support by January of 2012 (this was the plan from mid-2011, while the polished support would come much later). In November of last year I then heard the KDE Wayland support would take longer as he idled the porting effort until a stable Wayland 1.0 release.
In catching up with Martin today over lunch, he mentioned that he has been working on cleaning up KWin to make it easier to bring to Wayland, but that it's basically all prep work.