The E17 project released a stable version of its window manager. If you plan to use it with Fedora you have to use the repository provided via the OpenSuSE buildservice. While the first versions of the packages didn't work on my Fedora 17 box they now do. This instructions should help you to install E17 on your Fedora system.
Create a new repository file with vim:
sudo vim /etc/yum.repos.d/e17.repo
and paste the following content into it:
[X11_Enlightenment_Factory] name=Enlightenment 17 and EFL devel project (Fedora_17) type=rpm-md baseurl=http://download.opensuse.org/repositories/X11:/Enlightenment:/Factory/Fedora_17/ gpgcheck=1 gpgkey=http://download.opensuse.org/repositories/X11:/Enlightenment:/Factory/Fedora_17/repodata/repomd.xml.key enabled=1
Now you should be able to install the E17 package using yum:
sudo yum install e17
Logout and if you're using GDM for session management choose E17 as your session window manager and log in again. Follow the wizard to setup E17 and enjoy it.
More detailed information about E17 worth reading it can be found here: http://www.enlightenment.org/p.php?p=about/e17&l=en