wiggit is a cool web service that provides an integration of Digg with Twitter.
You can configure the service to post your Dugg stories on your Twitter account.
You just have to create an account on the service and provide your Twitter and Digg details.
The service regularly checks for your latest Diggs and post them on the connected twitter account.
This concept is similar to twitterfeed except for that instead of a regular RSS feed, you are tweeting the stories you like on Digg!