I think one of my favorite features is to see what sites my friends are digging. Their diggs mean more than that of some random dude on the site. Plus its an easier way to filter through the 1000s of articles that go up everyday on Digg, without just depending on what’s recently popular.
The thing is… for this aspect of Digg to be useful, more of my friends need to use it. Do you use Digg? If so, what’s your user name? If you don’t use Digg, why don’t you use Digg?