This excerpt taken from the GOOG DEF 14A filed Mar 25, 2008.
A: The Notice will provide you with instructions regarding how to:
Choosing to receive your future proxy materials by email will save us the cost of printing and mailing documents to you and will reduce the impact of printing and mailing these materials on the environment. If you choose to receive future proxy materials by email, you will receive an email next year with instructions containing a link to those materials and a link to the proxy voting site. Your election to receive proxy materials by email will remain in effect until you terminate it.