This version will eventually never make it in the main repositories.
It can have some bugs and crashes. If you want to give it a try just do with limbo attached equo install kde-meta.
Incase you get a masked package remember that you can unmask packages like this:
echo “media-libs/gluon-9999” >> /etc/entropy/packages/package.unmask
(this post was written in Blogilo, a program that ships with KDE 4.4)