Xubuntu, the Xfce-based flavor of Xubuntu, is presently evaluating the use of Canonical's Mir display server via the XMir X11 transition layer. For helping in the process and testing, the Ubuntu derivative has made public some Xubuntu XMir images...
August 6, 2013
XMir-Based Xubuntu Images Now Available
Read more at Phoronix