Zhao's first guide covers building and setting up Wayland under Ubuntu 11.04. The instructions should also be of use for those looking to try out this experimental display server under Ubuntu 11.10. There is a Wayland package in the Ubuntu universe repository, but it's a Git snapshot from many months ago. There's also been other Ubuntu Wayland build guides, but this is just a version that an Intel engineer assembled.
The other document is likely more interesting to Phoronix readers (who are already familiar with the Wayland build process) and it provides an overview of the Wayland compositor process, the Wayland back/front-ends, and a simple API introduction to Wayland.
Find these documents on the wayland-devel mailing list (PDF attachments). 2012 should be an interesting year for Wayland. Keith Packard also has about a "half day of talks" from Intel engineers about Wayland, that back at XDC2011 he mentioned as a possibility for FOSDEM 2012, but that doesn't look like it will happen. Thus we're still waiting on hearing when we will hear more about the ongoing Wayland developments by Intel.