This plugin adds a new widget which can show statistics for your blog’s/forum’s 
Disqus comments: most popular discussions, top commenters, recent comments.
Configurable are: 
 * Color Theme 
 * Number of items to show 
 * Default tab view (most popular discussions, top commenters, recent comments) 
 * Whether to show the standard WordPress widget title bar 
 * Title of the widget in the title bar

Disqus Widget

Allows the user to display statistics for their blog's/forum's Disqus comments.

redatom

When your site’s audience grows, Disqus starts displaying its annoying ads on your page. This plugin removes ads from Disqus.

Remove Disqus Ads

Remove annoying ads from Disqus Comments.

Disqus Widget vs Remove Disqus Ads