1.) Head over to http://www.enlightenment.org/ to get the ppa for the packages. On the "Download" page, near the bottom is a "Package" section. Follow the link for "Ubuntu". At the time of writing this, the link is as follows: https://launchpad.net/~hannes-janetzek/+archive/enlightenment-svn
The link will take you to Personal Package Archive (ppa) managed by Hannes Janetzek, which is Enlightenment packages regularly built from SVN. Thanks to Hannes Janetzek for doing this for the community. The instructions to install and use the ppa will not be covered here as proper usage is explained there. I will note however that I am choosing and discussing the ppa for Oneiric (11.10) for Ubuntu version.
2.) For installation I chose to use the Synaptic Package Manager. For those who are not sure what that is, open a terminal and issue the following command:
$ sudo synaptic-pkexec &
Once the package manager is running, to be safe since we just added a repository location via ppa, click "Reload" to get an up to date list of packages available. Once that has completed, type "e17" into the quick filter. Figure out which packages you need and mark them for installation. When I did this, the dependencies were having trouble marking, but I had canonical e17 installed and this may have interfered, I'm not really sure. From my experience I recommend removing canonical e17 if you had it installed before installing the ppa packages.
What packages do you need? Well, at a minimum you will need to mark e17 and e17-data and anything they depend upon. In my case, I have a Ubuntu 64bit and I wanted all of Enlightenment, so I marked "detourious-theme", "e17", "e17-data" and anything with the prefix "emodule-". Also note, I marked the packages that did NOT have the suffix ":i386", those would be 32 bit packages.
Once your packages are marked, click "Apply" to install them.
3.) Now that the packages have been installed, from the login in screen (lightdm or gdm) where you enter your username and password to login, there is an option to select the "Session". In the case of lightdm (Ubuntu default) this will be a small cog (gear) next to your name. Click on it and choose "Enlightenment". Continue logging on as normal and Enlightenment will start.
The nice thing about the ppa version is Enlightenment will automatically start the gnome-settings-daemon which is necessary to draw Gnome windows (in particular the fonts) correctly. However if you open a window (such as Firefox) you will probably notice some oversized fonts. To fix this, right click somewhere on the desktop or on the "Start" button on the bottom "shelf". In the menu that pops up select Settings->Settings Panel.
At the top of the Settings Panel are "tabs", select the one that says "Looks" and click on it (though you should already be on it). On the new window that appears at the very bottom are 3 check boxes, the last one reading "Enable Settings Daemon", this needs to be unchecked. At the bottom of the window then click "Apply" and now all your Gnome windows should be managed by the gnome-settings-daemon as they had been in the regular "Ubuntu" session.
That's it. Now there are some other "quirks" if you are coming from Unity, but we'll work on those another time. Meanwhile play with themes, settings, gadgets and modules, there are a lot of nice ways to configure Enlightenment.