A cool feature for the small web would be:

1. I like your blog and subscribe to its RSS

2. I see new posts in my RSS reader with syndication links to (HN/reddit/twitter/etc).

3. I can go to those places to talk about it.

Low tech version is just linking to those discussions at the bottom of your post I guess.

I've never implemented it, but I think WebMentions was supposed to enable this