Many of you have been asking whether it is ready to be tested, the answer is - still in development. As i noticed, the gradient was a bit different from the current eGTK from the daily ppa. Though, if you wanna get your itchy hands on it, here's how:
sudo apt-get install bzr
bzr branch lp:~tombeckmann/egtk/dark-theme
sudo <insert file manager generic name>
And copy the whole dark-theme folder from your home folder into /usr/share/themes
To avoid having two theme on the same name, I do advice you to change the index.theme file in the folder before copying.