It's actually become one of those pages which you'd want to constantly keep opened in a tab. Add it to the list of GMail and Netvibes. I'm going to do that the moment I get my new laptop! I need to take a breath! *Phoo!!*
Ok! Starting again! :-P I have not been able to find (in my brief skimming through their pages) for an official feature list or a changelog of any kind. Although, people who've kept up with the update would have tracked down The Digg Blog which opened with the launch of the new version. Here is someone really catching on the wave for a free ride. Keep a look out for that blog rising up the charts.
As you can see, I have only praises for the new digg. Perfect example of how to improve on perfection! Great work fella's! You've been dugg!