I meant to mention this earlier, but must have missed it. I'll throw in a quick note about it before I head out for the day (I'm in NY, right at the moment, and need to make a quick update on the site before I get going).
It isn't difficult to count reoccurring phrases, or reoccurring words. Interestingly enough, counting reoccurring words most usually comes up with the main character's names, more than anything else.

We actually have this sort of functionality written into our patent, and it's something that will be implemented on the live system when... well, in the next one or two months, hopefully. Depends on some factors.
I'm fairly excited because we're getting to a point that - hopefully soon - the things we're working on now will be able to start impacting the front end that people are interfacing with, so that we can say, "We're implementing this feature," and then a week later you guys and see it show up on the site. We're not there yet, but the obstacles are coming down.

Aaron