I am interested in vocational college (mbo in Dutch) teaching and learning. So #edopk12 as an extension of #oped12 has my vote, George Hobson. Higher education is not that different from other education. Maybe university students can cope more with lack of structure and guidance, but I doubt that.
In week 1 I did read The cathedral and the bazaar.
“… Both the fetchmail and Linux kernel projects show that by properly rewarding the egos of many other hackers, a strong developer/coordinator can use the Internet to capture the benefits of having lots of co-developers without having a project collapse into a chaotic mess. …”
I am connected to Wikiwijs the Dutch OER website, search engine and sharing platform for all education from pre-school till university. Wikiwijs is Open Source, so you could get the code and rebuild it. The repository of Wikiwijs is growing. Quality groups are working. The reward for teachers who share education materials is only by words and “thank you very much”. And this works.