Aaron D. Campbell

Expire Comment Links was inspired by <a href="http://yoast.com" rel="nofollow ugc">Joost de Valk</a> 
in an article he wrote called 
<a href="http://www.searchcowboys.com/columns/764" rel="nofollow ugc">Comment links: an experiment</a>. 
It all started when Matt Cutts talked about how Google changed how it handles no 
follow links in his article on 
<a href="http://www.mattcutts.com/blog/pagerank-sculpting/" rel="nofollow ugc">PageRank Sculpting</a>.
No one knows for sure yet if this will be beneficial or not, but for those that 
want to be on the cutting edge and try this experiment for themselves, this 
plugin automates everything.
Requires PHP5.
You may also be interested in <a href="http://wpinformer.com" rel="nofollow ugc">WordPress tips and tricks at WordPress Informer</a> or general <a href="http://webdevnews.net" rel="nofollow ugc">Web Developer News</a>

Expire Comment Links

Allows you to stop displaying links for old comments. PHP 5+ required.

getincss

Wanna attract more visitors and RSS readers? Plugin “Target Visitors” will help you to grow up your counters!
Plugin shows a special message to your blog’s visitors, who coming from search engines (Google, Yandex, MSN, Yahoo, Mail.ru, Altavista, Liveinternet, Rambler) and highlight words (search engine request) in post, comments, title, tags and others.
It’s really important to attract visitors attention. You can add any message to display it, for example:
“Like this article? Follow my blog! (rss link here)”.
So, your visitors will be more interested to follow your blog updates and you will see how your rss counter growing up 🙂
For Russian users:
Плагин показывает специальное сообщение для пользователей пришедших с поисковых систем Google, Yandex, Mail, Yahoo, Liveinternet, Rambler, Altavista, Msn. Найденные слова подствечиваются (см. скриншоты)
<a href="http://www.getincss.ru/2008/07/13/wp-target-visitors/" rel="nofollow ugc">Домашняя страница плагина</a>
<h3>Features</h3>
<ol>
<li>It’s easy way to attract you target visitors to subscribe you feed.</li>
<li>All found requests will be highlighting in title, content and comments text.</li>
<li>It’s absolutely free 🙂</li>
</ol>

Target Visitors

Plugin shows a special message to your blog's visitors, who coming from search engines (Google, Yandex, MSN, Yahoo, Mail.

Expire Comment Links vs Target Visitors