"All too often, the connection between content and community goes missing."
I'm not sure how my activity (student peer review feedback on a wiki) would necessarily contribute to this article but the above quote, and surrounding paragraphs, highlighted to me an aspect that is missing from my activity. And that I will try to implement in the future (perhaps next term).
This particular activity is primarily content driven and lacks in the community aspect. An easy way to deal with that would be to utilize the "discussion" function that most wikis offer. This way students could communicate in another forum, and create community, away from the specific feedback itself.