Google is now the Silicon Valley's biggest!

Google, the giant search engine in Mountain View, has surpassed Cisco to become the valley's most valuable company, when the market closed on Oct 18, 2007.

Google's stock closed at $639.62, bringing its total market capital to $199.65 billion, marching to $200 billion soon.

Cisco which closed at $32.68, is breathing down the neck of Google, has a value of $199.32 billion.

The battle is still on between the two leading technology companies.