Although getting knowledge transfer from people without blogs is a good point. But, in that case, I think a simple Wordpress setup would be better than running from a git repository. I think we tend to overlook git as the barrier of entry that it is.
What gives HN its value is that it's already curated, so if you decide to do this, I think there needs to be a voting system to help give weight to particularly good points.
I could see this turning into too much of a directionless, superfluous stack of tech posts, though.