This is in part my motivation for http://hubski.com, which is a sharing-based aggregator. I think that news that comes with crowd-sourced analysis is infinitely more valuable than the MSM formula, and that's where aggregators shine. However, curation is something that doesn't crowd-source as well. IMHO curation gets stale if it's completely crowd-sourced, but it also gets stale if it's left up to the individual. The solution I'm trying is to allow users to put their curation in the hands of a group of select people. It's easy to see who is contributing what, and if someone isn't providing value, you swap them for someone else. -You basically build a curation group.