I get Disqus now

Very briefly: in the near future, smart people will switch from “can you link to me” to “can you comment on my post?” – both weak invites, but my point is that the comment will be noticed by more of the early adopters who are active in social networks who actually track key influencers on this level.  Static links and banners and buttons will still have a place, but getting involved in the conversation is going to require… getting involved in the conversation.