Semantic Web put to action

Interesting to read how Reuters has opened up a semantic web API called Open Calais. This API could structure an HTML page for entities like organization, people, events and more. So if you give an html page, it would generate a meta-data of people (name), company (where they work), events(what happened in that company) etc. Doesnt it sound amazing :). OpenCalais uses NLP, machine learning to generate this meta data. This meta data is finally presented as RDF document. As you would have guessed, this could surely help information search in a lot of ways.