I had just completed a post where I was testing a new plug-in for WordPress. Thanks to Christine of The Sapheyerblu Review, who was the first person to test it and therefore gets a special mention, I know that it works. Its pretty configurable and I’ve set it so it only shows the top 5.
An added bonus for those who comment is that their name is also linked to their blog. The bonus for me is that if they want to continue to have their name displayed they will return and continue to comment. If you would like this plug-in for your WordPress blog it’s called Show Top Commentators by Nate Sanden.