Great pointers! What I really want to include in the nearer future is entity extraction. That means that we could send the text-contents of a document to an en

Great pointers! What I really want to include in the nearer future is entity extraction. That means that we could send the text-contents of a document to an entity-extraction service (like OpenCalais) in order to get back a list of entities that are mentioned in the text (that's what documentcloud.org is doing). By doing this, not only our documents could be tagged automatically, but also scenarios like the ones you described are made possible (given that entity-extraction can be performed fast enough). What do you think? I may get back to you when I start working on it. It's on the queue for sure. :)