Hi all,
Somehow, I completely forgot about the release for the unity-gles project. All OpenGL|ES enablement for the Ubuntu Unity plugin (the Unity3D "shell") and the nux library has been merged into the respective trunks on launchpad for those projects (lp:unity, lp:nux), so Linaro will not be releasing those. There are 2012.03 release tarballs for compiz itself (both compiz-core and compiz-plugins-main) at https://launchpad.net/unity-gles. These will support Precise only, due to external library dependencies.
cheers, Jesse