Curation is ART

According to Wikipedia "Art is the product or process of deliberately arranging items (often with symbolic significance) in a way that influences and affects one or more of the senses, emotions, and intellect."

Curation is the act of deliberately organizing content around a topic in a way that informs and educates your audience.

The headlines for a piece of content can be viewed as symbols. A headline is what draws people to reading and article or not. Additionally tags and tag clouds are also a symbolic representation of the curated collection of articles.

The objective of a curator is to pick the best of class on a topic and organize it in a way that is informative and revealing.

A Curator needs domain expertise, must understand the field of inquiry and use his or her knowledge to paint a picture utilizing the headlines, groups and tags.

Like any piece of ART, a best of class curated set is the labor of many iterations and experimentations.

This I would say is a work of art - Art of communication, Art of Marketing.