I would like to suggest emphasis on the difference between free software and open source. Actually, I believe that a community-wide reflection on the use of “Open source” is important.
Open source is an unfortunate term that was created because free means both freedom and free of charge. Open source was a way of avoiding confusion with the later. This ambiguity is found only in the English language - other languages have different words. Unfortunately it leads to a conceptual weakness - see Why Open Source misses the point of Free Software.
There are several definitions of intellectual works based on the four freedoms, initially defined for free software. I would like to point to the Definition of Free Cultural Works. This definition came latter, but is more fundamental than those for specific domains (i.e. software, hardware, multimedia). It is conceptually more accurate than those definitions that refers to open-source. As a reference, this definition was chosen for Wikimedia Foundation’s Licencing Policy.
I wrote about the different concepts related to knowledge freedom - it can be found here (in Portuguese) and here (Spanish translation) by @jarancio. I am planning on writing a paper on “Lessons from the free software” aimed towards the open hardware community as I think we have a lot to learn from the free software experiences. If you are interested drop me a line.