I am not sure if Ubuntu Mate 14.10 is an official release from Canonical yet. It is still to be listed in distrowatch. But, never-the-less I came across this distro as a reference from a couple of readers from my blog. I used the distro for a week and I am writing down my experience with the distro. It has the same specifics as Ubuntu 14.10 - the desktop environment is different here: Mate 1.8.1