I don't particularly like the trend of sites offloading their commenting mechanisms to Twitter, Facebook, DISQUS, etc. If it's Facebook, I'll never see it, due to browser plugins. Twitter is often too short for a good conversation, but if you do use it, run a script to import/display related tweets instead of making me click. I'm not a fan of DISQUS either, partly because I use Ghostery. (Alhough, it's good that the new version has a quick "enable once and reload" feature.)
If the purpose of your site is to generate discussion, include a discussion mechanism. If you like the clean look and don't want comments, expect less feedback.
Sending users elsewhere, or requiring extra clicks to see the conversation means less engagement. Maybe that's what some want, and use it as an effort to separate wheat and chaff ... but frankly, that's what moderation is for.