From DistroWatch

Stéphane Graber has announced that the first alpha build of what will eventually become Ubuntu 14.10 "Utopic Unicorn", is ready for testing. As has been the case recently, this is an optional testing stage and only four of the official Ubuntu sub-projects (namely, Kubuntu, Lubuntu, Ubuntu GNOME and Ubuntu Kylin) have decided to participate in alpha testing.
Ubuntu 14.10 (Utopic Unicorn) alpha-1 released

Pre-releases of the Utopic Unicorn are *not* encouraged for anyone
needing a stable system or anyone who is not comfortable running
into occasional, even frequent breakage.
I am running it on both an extra computer, and a VirtualBox virtual machine.