This presentation by Corinne Weisgerber touches in a very clear format on what separates aggregation than curation. And which, in my opinion, can be summarized by the human touch. While aggregation can be automated, curation is essentially the expression act of a human being.
It completes nicely what Robin Good also expressed previously on this topic on his blog to specify what good curators did. And which I published under the “Curating the Curators” title.
For us at Scoop.it, we take the democratization of curation as an opportunity: can anybody be a curator? We say yes. Provided a good platform is here to help and make these guidelines for good curation not only easy but obvious.