Wow, this really rocks. Funny to see this right now as I've been experimenting with web scraping for the real estate sector - a project that I've made available open source here:
One of the things I really would like to do would be to make a chrome extension to help people export data as they search for properties. Will look into this product as soon as I get the chance and provide some feedback.
Good question! When a designer is extracting content from a customer's old website, they save all of the structured information about that customer in a single context, keyed by the customer's ID.