As some of you already know, I am the main developer for Drigg. I donated probably more than 1000 hours of my life to the Drigg project, because I believed in it. After reviewing existing CMSs out there, I believe that Drigg is the best system available today for people who want to create Digg-like sites (but, in fact, when people deploy Drigg they get fully functional Drupal sites...!). You can see my contributions to Drigg daily. One more programmer has joined Drigg, which is going right ahead.
However, Drigg's community is still smaller than Pligg, its main competitor. Why?