“P2 is a theme for WordPress that transforms a mild-mannered blog into a super-blog with features like inline comments, a posting form right on the homepage, inline editing of posts and comments, real-time updates, and much more.” Interesting side note: at automattic, the people behind Wordpress, it is used to replace e-mail, its the central communication-hub: http://www.businessinsider.com/automattic-no-email-no-office-workers-2013-11