Disqus is nice comments system, but realisation for wordpress does not support dofollow commentators links. There is a nice way to make disqus comments dofollow, without updating troubles.

Creating own comments template

This template is usefull only for search engine crawlers or users without java-script. After Disqus script is runed, it loads comments from own servers, this is usefull when page is cached for a long time.

Rename comments.php from /wp-content/plugins/disqus-comment-system/ to disqus-comments.php and copy it to your theme folder .

Editing disqus-comments

Edit disqus-comments.php from your template folder. Find this text

Change this to

Activating own comments template

Add this code to functions.php in you theme folder.