> By prioritizing the content and votes cast by highly reputed users, as opposed to anonymous new arrivals whom no one knows or trusts, Caucus is better able to figure out which content is most trustworthy.
How do you avoid the "Power User" effect that Digg (and arguably Reddit) ran into? If your most reputable users keep getting more and more reputable, eventually you have only a handful of very active users who have a majority of the voting power.