greftek

This plug-in adds a Daily Dilbert Comic widget to the Sidebar Arrangement page, which can be added in the normal fashion. Just drag-n-drop the widget into the sidebar to add it to your blog.
Click on the options button to add a custom title.

The Daily Dilbert

This plug-in adds a Daily Dilbert Comic widget to the Sidebar Arrangement page, which can be added in the normal fashion. Just drag-n-drop the widget  …

videomike

It adds a button to the TinyMCE Editor in your wordpress installation so that you can integrate the cartoon with one click on any page or post you like. 
The config page lets you choose the size of the cartoon image and the border thickness. 
The plugin comes with a widget to make it easy to integrate the cartoon on your sidebar.

WP-Cartoon

This plugin lets you integrate the daily web cartoon from http://www.danscartoons.com/ for non-commercial websites.

The Daily Dilbert vs WP-Cartoon