Kyles Cove suggested to add DiggThis to GreatNews. Given the popularity of Digg.com I should have added this feature long time ago. While I’m working on it, you can use the generic BlogThis feature in GreatNews to add DiggThis function. Definitely not optimal, but barely usable.
1. Goto Tools->Options->Features->Configure Blog Tools
2. Creat a new Blog Tool, and name it Digg This. The parameters are shown in the screenshot. The URL field is:
3. Save and close Options dialog.
Now under each article you will see a BlogThis link, click the Digg This menu you will be submitting the article to digg.com!
Thanks Kyles for the suggestion!