According to Robert Scoble, a curator is an information chemist. He or she mixes atoms together in a way to build an info-molecule.
Then adds value to that molecule. The seven needs of a real-time curators are:
Bundle: link information together and summarize it;
Reorder things: arrange the most important elements in an order that facilitates their use;
Distribute bundles: use online tools to distribute aggregated information, choosing the right audience;
Editorialize: express an opinion on the content that is spreading, and explain why they considers them so important;
Update their bundles: update the data, and distribute the updated information;
Add participation widgets: encourage participation, for example by allowing readers to comment;
Track their audience: keep track of how many times the content has been disseminated and redistributed.