I am pretty sure that deploying a comment ranking system in blogs will have some strong function in a web-based learning world. I made a comment about it at Fred Wilson’s blog, and I think that it represents a piece of the puzzle that will enable blogs to carry some legitimacy.
Disqus is testing out a feature on certain blogs. They may not be visualizing the education web-based curriculum, but I could not help my self from postulation.
The idea is that if you are working in a learning system that uses the social web to link people, you will need comments or badges to link people to their credibility and reputatino in the group. Right now, education is mostly about grades and diplomas, and standardized test performance.
When it moves towards a realtime application of skills to problems that need solutions, blogs will form a fundamental core to linking experts to students, and then student-expert teams that run communities. To get into a community you apply, just as you would to get into college, and the comment ranking and reputation score will indicate your likelihood of acceptance.
I’ve always said that your reputation will be the most important feature of your web presence. You may be the smartest dog in the pack, but if you are always biting others on the tail and trying to keep that bone to yourself, you’re out. Keep that in mind; it will be fundamental in the next few years.