The response I recieved from my-comments was so positive, that I decided to make the logical follow-up, which I have named our-comments.
Our-comments is meant for blogs with several authors. The plugin enables the possiblity of making individual comment styles for the authors you specify. So if you for instance have 4 authors you can make their comments look different from other comments - but also from each other. If you have regular visitors (friends, family or the like) you can also honour them by giving them their own comment style.
The css classes generated from the plugin can be defined from wp-layout.css.
Read more and download the plugin
PLEASE NOTE: I've only done some preliminary testing, so the plugin is still very beta - it should work however :-)
It was Shadow who suggested this follow-up to my-comments, so if you like our-comments please remember to thank him!