What I think would be interesting would be a link aggregator based around tags rather than subcommunities. Moderation would be based around these tags. Your feed would be based on tag queries. Posts could have multiple tags, assigned by the original poster or by users. Assigning tags would have a similar effect to voting, so a post might get tagged by 1000 people as 'corporate lies', or as 'music', or whatever else.
Nice thing about this would be finer grained queries with news, for instance. Could get 'politics', but minus 'corporate lies'.