This looks interesting. How do I know if someone else has left comments at a website / page I'm visiting? I probably wouldn't want to open the comments sidebar on each page, to find out. And I wouldn't notice if there's some small notification icon. The only things I'd react to, is blinkng light, and sound playing "There are comments". But is that too intrusive? To me, a voice saying "There are comments" would be fine.<p>Who is going to moderate comments? I'm afraid people who say evil angry things to other will dominate a discussion system like this, as is usually the case, when there is no strict moderation, right. Well maybe as long as you use Facebook Comments, it has moderation features already?