P2 is the famous WordPress theme which is live, used by Automattic bloggers and WP developers. You can see it working on most of the WP developers blogs. You can download it from here.
P2; Blogging at the speed of thought, 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.
– Automattic
Here we are discussing about adding more features to your P2 blog. There are many good P2 plugins available in the WordPress plugin repository that adds few more good features to your P2 blog:
P2 Likes
It brings Facebook-like functionality to your P2 site, gives a like button to each post.
Who’s Online
Keep track of who’s reading your P2 blog right now. “Who’s Online” sidebar widget shows a list of recently-active blog users. View screenshot here.
P2 Resolved Posts
P2 Resolved Posts lets your P2 Blog users mark a post for “resolved” or “unresolved” issues. It turns Your WordPress P2 Blog Can Now Be A Full-Blown Issue Tracker.
Mention-Me Widget
This plugin adds a simple widget based on P2 recent-comment widget for displaying @replies for a logged in user.
Jetpack Follow Link for P2
JetPack by WordPress plugin is a prerequisite here. If you are using JetPack then after activating this plugin one can easily subscribe to a P2 comment thread without commenting using a “Follow” action link like WordPress.com