Cool button. However, and I am a fairly new member of HN, I think the beauty of HN is partly in the old-school interface and the lack of a 'like' button. Manually copy-pasting a link actually enforces some level of commitment on your part. Having a one-click button would drive too much less interesting content.

That said, it would be nice if this button scouted HN for the page URL and simply notified users that a discussion with X comments was taking place here.

This solution would reduce the amount of gaming that one could do to vote a post up, but would let dedicated readers know where to look. Thoughts?