The Ubuntu 14.10 Beta 1 release is now available for Ubuntu flavors: GNOME, Kubuntu, Xubuntu, Lubuntu, Kylin and Ubuntu Cloud.
The Ubuntu GNOME Beta 1 includes GNOME Shell 3.12.
The Kubuntu Beta 1 includes KDE Platform 4.14. (The KDE Plasma 5 version is available in a separate image.)
The first beta version for regular Ubuntu 14.10 will be available on September 25.
Here are the links for download:
Ubuntu GNOME 14.10 (Utopic Unicorn) Beta 1
Kubuntu 14.10 (Utopic Unicorn) Beta 1
Kubuntu 14.10 (Utopic Unicorn) Beta 1 – Plasma 5 Desktop UI Edition Please note that this is a 64-bit version only.
Xubuntu 14.10 (Utopic Unicorn) Beta 1
Lubuntu 14.10 (Utopic Unicorn) Beta 1