Wayland Is Now Available In Ubuntu 11.04
Canonical's Bryce Harrington has just announced he has uploaded a snapshot of the Wayland Display Server to the Universe repository for Ubuntu 11.04, a.k.a. the upcoming "Natty Narwhal" Linux release.
Though before getting too excited, this of course is just a snapshot for experimenting and is not installed by default nor is it really usable for anything outside of experiments. It will not be until Ubuntu 11.10 or later where Wayland will be used with Ubuntu's Unity desktop in supported hardware/software configurations.
With this Wayland snapshot found in the Ubuntu Natty repository.