Oh, ok, so getting X.org running under Wayland was easier than expected. Or I guess, it was as easy as expected, which is usually never the case.
Still hacking on the Wayland project. I've spent some time getting the repaint loop and repaint notifications right, which is surprisingly tricky if you want to sync to vblank and make sure every client gets a chance to paint every frame.
I found this link over on the github.com blog: