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.

Jonny Harris

Andrew Bartel

DeusMachineLLC

Aaron J White

RenettaRenula

The Disqus Recent Comments Widget plugin will create a configurable widget that will allow you to display comments in any widgetized area of your theme like sidebars and footers.
You can customize the comment length and date format, filter users and choose from three different markup templates, among other things. The plugin has full support for custom markup defined with register_sidebars() and should integrate smoothly with most themes in the wp.org repository.
We try to be very proactive and responsive with support. So, if you have any issues, please post in the support forums and we’ll do our best to resolve your issue promptly.
You can follow development here: https://github.com/andrewbartel/Disqus_Recent_Comments

Disqus Recent Comments Widget

Disqus has dropped support for their recent comments widget.  This plugin creates a configurable widget that will display your latest Disqus comments.

Disqus Widget vs Disqus Recent Comments Widget