Hi webgrrrl (plugin author of http://wordpress.org/extend/plugins/top-commentators-widget/),
I have a few suggestions I would like to put to you for the plugin.
Recently I had a look at the Top Contributors WordPress plugin, and I noticed it has KeywordLuv integration. http://wordpress.org/extend/plugins/top-contributors/ Is there any possibility of adding the code from this plugin to the Top Commentators Widget to stop peoples names showing up with an @ symbol?
My second suggestion is could the hyperlink be exclusive to the persons name? Currently the image and the number of comments are also included in the a href tag, which looks a little messy.
Finally, when the commenter has no URL, and the plugin is selected to display the URL, the number of comments the author has disappears...
If you want to see what I mean on my last point, go to Technology Bloggers and scroll down to the widget (footer, first column) and you will see my name (Christopher Roberts) has no hyperlink, but also no comment count.
Thanks for your time, I hope these suggestions are useful and if at all possible, added to the next release of the plugin :-)