It's the Rebecca Black OS that serves as a live platform for experimenting with Wayland. There was a new release at the end of October but now it's been updated again to handle the recent XWayland patches. XWayland allows for running X11 applications on top of Wayland. THe XWayland code should be merged into the mainline X.Org Server for the 1.14 release in March.
The Rebecca Black OS developer writes, "With this, its starting to become almost usable, although I would not yet recommend it for production yet, there are still some issues, namely the placement of X windows and menus are still random."
The Wayland OS can be downloaded from SourceForge while additional details are available from the new release announcement.