Twitter for WordPress make twitter as comment for your blog.
Usage
To put submit form just add strings as follows. 
(You must not change submit form HTML at all. If you change something this plugin will not work correctly.)
<pre><code><?php twlink_for_wpcomment_submit("username"); ?>
</code></pre>
To put comments which is submitted to you blog through twitterLink for WordPress Comment, just add strings as follows.
<pre><code><?php twlink_for_wpcomment_recieve(); ?>
</code></pre>
If you want to customize, you can add 2 options. 
First option “display_comment_limit” is the limit number of comments to display (default value is “all”). 
Second option “islist” is boolean value and is the style setting option. 
If set this option as true then comments are displayed using 
<ul>
<li> tags, 
and if set this option as false then comments are displayed without 
<ul>
<li> tags,</li>
</ul>
</li>
</ul>
<pre><code><?php twlink_for_wpcomment_recieve("display_comment_limit","islist"); ?>
</code></pre>
example <code><?php twlink_for_wpcomment_recieve(5,true); ?></code>
If you want to add Link to twitterLink site add strings as follows.
<pre><code><?php echo twlink_for_wpcomment_link(); ?>
</code></pre>
Customization
The plug in provides the following CSS classes:
<pre><code>* form.tlfc_commentform: the submit form
* ul.twitterlink_fc: the main ul (if list is activated)
</code></pre>
<h3>Contact</h3>
Suggestion, fixes, rants, congratulations, gifts et al to help[at]seunze.com

twitterLink for WordPress comment

Twitter for WordPress make twitter as comment for your blog.

wackey

This plug-in is Twitter “@Anywhere” API and “Topsy” API using. 
Visitor’s twitter account can be attested putting up connected button to the blog entry. 
After it attests it, link and blog owner’s following buttons and blog owner’s twitter profile can be displayed. 
Furthermore, the visitor takes side with the page by visitor’s account and it is possible to contribute. It is default and there are url on the page and blog owner’s twitter account. As a result, my account and blog URL will flow out on twitter, and the conversation extends.
<h3>Requirements</h3>
<ul>
<li>WordPress 2.9 or later</li>
<li>PHP 5.0 or later</li>
</ul>

Tw Anyware comment system

Add Twitter anyware API,connect and tweet,follow.And Topsy API using.It displays it like the comment column.

twitterLink for WordPress comment vs Tw Anyware comment system