Disqus is a popular blog commenting service that reaches about 200 million people per month and is integrated in over 500,000 websites. Now the company is rolling out a new version. Version 4.0 has a new design and a new commenter dashboard to manage all comments. There are also pro add-ons that can be purchased.
Some of the paid pro add-ons include analytics, single sign-on for integrating other use login systems, and there is an advanced theme editor. Paid features start at $19 per month. Websites that use Disqus include CNN, MTV, Engadget, IGN, and Adult Swim.