BBC SPARQL end-points http://blog.dbtune.org/post/2009/06/11/BBC-SPARQL-end-points has an example "All programmes that featured an artist originating from Northern Ireland" which combines data from the BBC and Dbpedia
Open Calais http://www.opencalais.com/GetStarted "Calais is a web service that uses natural language processing (NLP) technology to semantically tag text that is input to the service. The tags are delivered to the user who can then incorporate them into other applications - for search, news aggregation, blogs, catalogs" etc...
"Berkman Center unveils fascinating insight into media trends, with a little Semantic Web goodness from Calais under the hood" http://cloudofdata.com/2009/03/berkman-center-unveils-fascinating-insigh...
- The Press.net News Ontology describes the assets (text, images, video), events and entities (people, places, organisations, abstract concepts etc.) that appear in news content. An overview is provided in the Press.net News Ontology blog.