To me Digg died with the AACS censorship debacle. In hindsight, I understand Kevin Rose was trying to protect Digg from lawsuits that would effectively destroy the site, but the censorship did the same.
Digg died for me when they shifted the focus of their front-page from Technology and Headline News to more “mainstream” topics - eventually the frontoage was entirely NFL-related story links - this was a while after the AACS incident.
