The Deep Web

Estimated to be 550x larger than the "surface web" you know and love. The deep web is all those sites and pages that are "missed" by the web crawlers and spiders used by the search giants.

http://brightplanet.com/pdf/deepwebwhitepaper.pdf

And, of course, you can always read about it at the Wikipedia.

http://en.wikipedia.org/wiki/Deep_web

We will talk about this more in the future.