Here's a great example of a news agency which built a Web widget and is using text mining to tell a story about a bigger picture. .
This is Reuters AlertNet's World Press Tracker. It uses Factiva's press archive. Factiva is now wholely owned by Dow Jones. This project dates back to when Factiva was half-owned by Reuters.
Here's what they're doing:
Our system analyses relevant articles from these [Factiva's 10,000 press] sources and decides whether they are about any of the 80 or so global emergencies AlertNet tracks at a given time. Emergencies are ranked according to the number of press mentions they get.