I've found a few guides but all of them are really complicated. Is there an
apt-get way of installing the package?
This is the PPA of the team packaging it for ubuntu .
Once you add the PPA to the repositories, you can then use synaptics to install it. As of today, the repo is updated with packages for Jaunty. I did not try it myself, but it could work for karmic esily.
EDIT: ~quack in the comments suggests to rebuild packages for Karmic from PPA sources... that seems like a sound idea to me!
I'm assuming you want e17 as it is the newest and most feature-packed version. There is a good walk-through here:
It is not for Karmic, but all the steps work. I'm running 10.04 pre-alpha and this worked on my system just fine. If you don't like that version, use the easy_e17 script, explained here: