The Alpha release of the upcoming Fedora 18 (Spherical Cow) Linux operating system has been announced earlier today, September 18th, featuring KDE 4.9.
Fedora 18 Alpha KDE Edition is powered by Linux kernel 3.6 and KDE Software Compilation 4.9.
Fedora 18 Alpha is distributed as Live CDs with GNOME, KDE, Xfce, LXDE and SoaS desktop environments, as well as an installable DVD ISO image for both 32-bit and 64-bit platforms.
Download Fedora 18 Alpha right now from Softpedia.
Remember that this is an alpha release and it should NOT be installed on production machines. It is intended to be used for testing purposes only.