blueinstyle

Options include showing comments from specific categories, or excluding categories.
Exclude users from comment list by email address.
Uses a template to display comments exactly the way you want.
Limit amount of words or characters to display in each comment.
Include user’s Gravatar or Facebook avatar in comment list.
Create unlimited comment lists each with their own unique settings and options.
Support and Feature requests are on my forums at http://justmyecho.com/forums/

Customized Recent Comments

Display recent comments on your blog with complete control over the layout and format of comments.

Corey Salzano

This plugin replaces the default recent comments widget so it behaves differently. Instead of the format “username on post title,” the widget will display “username said comment excerpt.”
All development happens on Github at <a href="https://github.com/csalzano/recent-comments-widget-with-comment-excerpts" rel="nofollow ugc">https://github.com/csalzano/recent-comments-widget-with-comment-excerpts</a>
Contact me by posting a message in the forums or <a href="https://twitter.com/breakfastcodes" rel="nofollow ugc">@breakfastcodes</a> on twitter.

Does exactly what it's supposed to do

Changes the behavior of the built-in Recent Comments widget to display comment excerpts instead of post titles

Customized Recent Comments vs Recent Comments Widget with Comment Excerpts