Anne Nicolas has announced here that the last alpha of Mageia 4 is available for download.This alpha brings KDE 4.11.1, Gnome 3.10.0 and now Mate is found inside the repositories.
Other changes are the movement to the network interface naming scheme available in systemd v197+ to ensure that the network interfaces are predictable.
However, this early development version is not intended to be used daily as a stable release; it should not be installed in production environments or used for writing reviews.