Thanks for the feedback. Hopefully the instructions in the article will be helpful to the docker team first and foremost, and adventurous hackers possibly. The hope is that this will become part of official docker, not that people will have to repeat a 100+ step process.
As a side note, getting this working on Raspbian should be feasible (consider it an exercise for the reader), we just used Arch as we've focused on that for a bunch of other things.