This repository just holds a standalone copy of the Shell Desktop plugin from Weston freedesktop.org -- simple, easy to understand and modularized here.
Relies on Weston and its SDK for spawning the plugin process with the right API. It is using wl_shell_surface high-level wrapper of wl_surface for defining the desktop UI aspects and semantics, as defined in Wayland core protocol.
http://vignatti.wordpress.com/2013/03/05/ui-customization-on-wayland/