Learning and education. Highly contentious topics infused with politics and the corrupting influence of money sloshing around the system (e.g., textbooks, student loans, tuition fees).
Humanity has passed knowledge on for millennia and what's required is a willing student and a knowledgeable, savvy, patient, rigorous teacher. What our American and British institutions of higher education really are trying to achieve is the ability to instruct the maximum quantity of people at the lowest possible cost with a reasonable degree of effectiveness as measured by testing scores/graduation rates.
I think the open publishing of these courses and course materials is a wonderful thing that could possibly enhance mass literacy and allow curious people access to the finest knowledge pool in the world. It's what a global network should be about: to freely connect people thirsty for knowledge with all the information humanity has accumulated.
After working on technology in higher education for 11 years, I sometimes think all we're doing is tinkering around the edges and using technology as a distraction from addressing the real challenges in educating humanity.