If you’d like your own list of top commenters for 2010 here is the SQL.

SELECT comment_author, comment_author_url, comment_date, comment_approved, count(comment_author_url) as n FROM wp_comments WHERE comment_date > '2010-01-01 00:00:00' AND comment_approved = 1 GROUP BY comment_author_url ORDER BY n DESC

The sections marked in red may need changing – if you changed your DB prefix when you set up wordpress it may not be wp_comments.

The date might change if your reading this next year.

Run the query in phpmyadmin and export it as a php array then you can use this code to generate your list and copy and paste it to your blog.

echo '<ul>';
foreach($wp_comments as $x) {
echo '<li><a href="'.$x['comment_author_url'].'">'.$x['comment_author'].'</a></li>'; }
echo '<ul>';

Probably the most long winded way ever but at least my query is saved until next year :)