Tiago Vignatti is the former Nokia engineer who joined Intel OSTC to be part of the Wayland team and has been working on features as of late like multi-touch support. For those wanting to try out Qt on Wayland right now, Tiago has written a guide.
While Qt 4.8 was recently released with platform abstraction support, it's not compliant with the latest additions to Wayland that were freshly pulled into GTK and Clutter. So until Qt 5.0 is officially released in 2012, you need to be pulling from the Qt5 Git tree for the latest Wayland back-end support code.
Vignatti's guide covers building qtbase with Wayland support, building QtWayland, and then running a "hello window" sample Qt application within Wayland.
Those interested in trying out Qt under Wayland can find this guide on his blog.