Annika Backstrom

The “Who’s Online” sidebar widget shows a list of recently-active 
blog users. It has been built with Automattic’s <a href="http://p2theme.com/" rel="nofollow ugc">P2 
theme</a> in mind, but does not depend on P2 
functionality.
The most recently active users bubble up to the top. After one week, 
users fall off the bottom of the list and are hidden until they return. 
As of this writing the list does not support live sorting; the user 
order is fixed, and users missing from the list due to inactivity will 
be added to the top if they come online.

Works as expected

Who's reading your P2 blog right now? Keep track.

Hugh Lashbrooke

This plugin is built for and requires <a href="https://github.com/Automattic/o2" rel="nofollow ugc">O2</a> to be installed.
This plugin allows you to mark a selected comment as the one that effectively sums up the conversation from the thread. This is great for disucssions that require a final decision to be made, support threads where one comment has the best solution, and a host of other uses.
Functionality includes:
<ul>
<li>Marking a chosen comment as the ‘top comment’</li>
<li>The top comment is displayed at the top of the comment list with a ‘view in context’ anchor link</li>
<li>The top comment is also highlighted in context in the thread</li>
<li>Only one comment can be selected as the top comment</li>
<li>The top comment flag can be removed</li>
<li>Only users who are able to edit the post can select a top comment</li>
<li>Includes basic styling for top comments</li>
<li>‘Top comment’ label can be translated and/or filtered</li>
</ul>
<a href="https://github.com/hlashbrooke/The-Final-Word" rel="nofollow ugc">Contribute on GitHub</a>.

The Final Word

Have the final word in a comment thread by marking a chosen comment as the 'top comment'.

Who's Online vs The Final Word