Great idea, but why not just outsource the social aspect and leverage pre-existing link-discussion boards (i.e. HN/Reddit/etc)? As a user, I'm unlikely to want to change both the way I comment, and where my comments go.

I agree. It would be very useful to conveniently have HN, reddit, etc comments already there when I visit the site. Then I could comment on those.

On the other hand it should automatically submit the link to my preferred site, e.g. HN, and post my comment, thus creating a new source for comments.

Maybe something like this already exists?

It's like having a quality community of commenters...everywhere. And the TechCrunch setup is really cool. Nice work!

Yeah, every browser manufacturer should do this /sarcasm