“Now, after spending millions of dollars and years of effort on their virtual homes — which draw many more visitors than their physical ones — museums are rethinking their online collections. They are experimenting with one of the hottest Web 2.0 trends: tagging, the basis for popular sites like Flickr.com. In social tagging, users of a service provide the tags, or labels, that describe the content (of photos, Web links, art), thus creating a user-generated taxonomy, or folksonomy, as it’s called.”