Very nice. Been using the much older version 2.4 from rpmfusion. Glad to see they have their own Fedora repo now. To install, just do:
It's in my opinion the best looking dock for Linux. The configurability is almost too extensive, that's saying something from a KDE user who likes more options. You need to spend a couple hours exploring the options to make it do exactly what you want.
sudo rpm -i http://download.tuxfamily.org/glxdock/repository/fedora/fedora-18/noarch/repo-cairo-dock-1.0-1.fc18.noarch.rpm
sudo yum install cairo-dock cairo-dock-plugins