This extensions shows a little information (# of comments, date of registration) on the author of a comment.
It was only tested with the default Vanilla theme. I guess you have to alter the css file if you want to use it with some other style or theme. Speaking of style: The current style displays somewhat different in firefox/internet explorer and opera/konqueror. However, it\'s still readable in all cases I tested. If you come up with a more consistent css-solution you\'re welcome to let me know so I can update the extension.
How would one go about grabbing the variables created by this extension, the "Count" and "Date Joined", and adding it into a modified comments.php for a theme?