Credit:
Diggstr is, simply put, StumbleUpon for Digg. It takes Digg's content and serves it to you exactly like StumbleUpon, through a top navigation bar that lets you open new stories and Digg them without ever seeing Digg.
You can choose which Digg categories you want to see, and, if you like, you can set up precise filters for subcategories in Diggstr preferences. You can also choose whether you want to browse popular or upcoming stories, and, finally, you can choose between browsing news, images or videos.
That's pretty much all there is to Diggstr, but it works great. I still won't be abandoning the standard way of using Digg, but when you just want to relax and browse through some stories without much thinking, Diggstr is a good choice.