I'm not the first one to point this out, but Wired recently contained a post discussing a Drupal module that can be used to give you a Digg-like site.

Drupal developer Tony Mobily has built a new module for Drupal which
enables anyone to start up their own Digg clone. You can grab the code
and contribute to the project at drigg-code.org, or you can see it in action at drigg.org.

It looks like there may be some theming challenges to overcome, but the module looks very promsing for those that wish to build a site with some of Digg's features. Personally though, I'm not so sure I'm all that fond of news voting systems. Consider me bias, but I trust the editor (that's me) at CMSReport.com to focus on all the CMS news you need to know.