So cool! This is what I had started working on for the HNSearch API Contest, but I hadn't gotten far. I'm SO glad someone did this. I feel as though this could be made into a useful and viable product, if marketed correctly and accurate enough.
Also, allowing them to see the popularity of certain trends (traffic, if you will). I am not familiar with the industry…maybe the product exists…but it seems incredibly useful!
Well done, too.