Question: What are people actually doing with technology like this right now? (i.e. who are the people who see this and think.. yay, I'll sign up now!)
It's certainly not going to be ideal for your typical CRUD app. Think about all of the information that is locked inside of unstructured text (MS word docs, pdf's come to mind), and then imagine if you can scan through thousands of documents, find the named entities, and then start connecting them together in queries.
Obvious uses would be any kind of CMS. Investigative journalism is another.
I've recently started exploring the Legal Informatics field. The problems in it are huge and typically involving adding some structure to lots and lots of unstructured text.
Also, Peter, if you do end up reading this, great work on the stuff you do :) Big fan here!
Extracting important keywords from thousands of pages for example. On our website we let user enter quite a lot of content, and being able to extract keywords and find patterns between user could be key in naming categories and such.
Obvious uses would be any kind of CMS. Investigative journalism is another.