How Big Is the Web?

Sometime back, I was just wondering – how big was the Web? I did some “R&D” to come up with the conclusion that there are two flavors of the Web:
1) The Surface Web – the size of which is estimated to be 167 Terabytes (TB). The Surface Web is something which is easily searched by various search engines, such as, Google, MSN, Yahoo, etc.
2) The Deep Web – the size of which is estimated by the University of California at Berkeley to be 91000 Terabytes (TB). And, typical search engines just cannot peruse through these data.

So, if anybody is looking to kill the hegemony of Google over the Web, the Deep Web is the opportunity. Good luck.