Hi Daniel and everyone,
There is indeed a need to have a good discussion around these issues, and it was definitely one of the reasons for the creation of the new blog. I used my presentation slot at Sketching in Hardware to talk about these very questions, and we had a rousing conversation that I'm still trying to digest.
I do want to clarify one point about the licenses, however. The files were originally released under the CC share-alike, non-commercial license. After some internal discussion, we came around to the FSF and OSI point-of-view and dropped the non-commercial restriction. Apparently, we forgot to update the page for the single-sided serial board. That was an oversight that I've just fixed.
We would certainly like to have a broader public discussion about what we mean by open-hardware, etc. We just need to get our act together and find some agreement internally about how we'd like to go about it. Keep an eye on the blog for updates.