http://wired.com/news/technology/internet/0,71293-0.html

excerpt:
"Google has no current plans to be an internet service provider outside of our pilot Wi-Fi projects in Mountain View and San Francisco," said a Google spokesman who declined to be identified. "Our IPv6 allocation simply reflects planning for the day in the future when the services we currently provide via IPv4 will need to be accessible via IPv6."

Several sources have reported over the last year that Google has been quietly acquiring inactive or "unlit" optical cable – otherwise known as dark fiber – a key ingredient used to build data networks.