There is a new, small application available in Sparky repos, for Enlightenment lovers: Extra 0.0.1.
Extra is a app which allows you to install elementary themes on your computer.
The app is based on elementary and uses efl libraries to download the theme.
It does so by fetching themes from extra.enlightenment.org.
sudo apt-get update
sudo apt-get install extra
There is also a short entry about Extra in Sparky Wiki: