wpDiscuz – Comment Author Info Addon GPL Overview:
WordPress Comment System has a lack of information about comment authors, people only see commenter name and avatar. wpDiscuz Comment Author Info addon is designed to provide extended details about comment authors. Using this addon people will be able to see comment author extended profile, activity, votes and subscriptions. Click on comment author info icon and open pop-up window with according tabs. In Profile tab you can see commenter quick statistic (number of comments, posts, likes, dislikes), biography, etc… In Activity tab, all comments of this author, in the Votes tab: all voted comments and in the Subscriptions tab: all type of subscriptions to new comments.