Author page: Comments and Ratings?

I have a mult-author site where the author page gets high traffic. People want to know more about them. I have modified the author page to show more info, some custom fields, etc. but what I’d really like to do is turn on Comments for the author.php page (so that OTHER logged in users can leave review-like messages for the Author), and ultimately offer a star-ratings type of effect so that Users can “rate” the author. I have searched for plugins and other functions but it seems like everything is for Posts or Products or something. Any insight is greatly appreciated!