I really like this idea. HN is too curated to cover literally every site or article (and that's a good thing), but you could have a sidebar that federates mult

I really like this idea. HN is too curated to cover literally every site or article (and that's a good thing), but you could have a sidebar that federates multiple comment outlets... "Here's what people are saying online..." Like pingbacks, but less opt in. If nothing is found, the sidebar could push new comments to a special purpose subreddit, or some other default backstop.