A quick link out to Newssift, a news search engine produced by The Financial Times. The site uses semantic search technology, as well as a bit of analysis on the search results to create an interesting new product. While they don't reveal their content sources (and I wish they would at least provide a list of some sort), they have this statement on their site: "Newssift sources consist of thousands of global business news sources
and millions of articles, spanning news portals, magazines, newspapers,
news wires, research sources, online news, television and radio, and
I could see this being used for quick searches, current awarenes/monitoring type searches as well as to help refine searches and discover relationships between subjects.
Check it out at: http://www.newssift.com/index.jsp.