Add automated Digg links to your posts

Digg this wordpress plugin is a plugin that detects incoming links from Digg.com to your wordpress post and automatically display a link back to the digg post, for people to digg your story.
When a digg is first recognized an email is sent to the site’s admin

The detection is based on the referrer URL, which has to come from digg.
In case there is more than one digg posts to your page, only the first one will be displayed.