It’s the users of the community that are performing all the duties that would typically be performed by a standard admin on the site.
Richard MacManus has an interesting two part interview with Digg founder Kevin Rose over on ZDNET.com. I have been fascinated by Digg and Memeorandum since they launched. Both models offer glimpses of how media may potentially evolve in the future. It was insightful to hear Memeorandum founder Gabe Rivera on the latest Gillmor Gang explain the challenges involved in moving beyond his current politics and technology offerings. Future success for both Digg and Memeorandum lies in expanding beyond their core technology offerings. Interesting times ahead.
UPDATE : Don Dodge interview with Gabe Rivera
UPDATE 2 : Richard MacManus rates the meme trackers