By ANASTASIA USTINOVA, San Francisco Chronicle

Facebook, the world's largest social-networking site, is facing a class-action lawsuit charging that its controversial advertising program violated online privacy and computer fraud laws.

On a recent afternoon deep in the Amazon's rain forest, members of the Surui tribe, which made contact with the outside world less than 40 years ago, could not resist that urge well-known to modern man -- they Googled themselves.

Then they looked up football.

While the number of Californians who log on to the Internet has increased since 2000 from 65 percent to 70 percent, a statewide survey dictates there is a widening digital divide based on ethnicity, demographics and income.

SAN FRANCISCO -- After working for years as a housekeeper, dishwasher and babysitter, Maria Carrillo developed excruciating pain in her legs and arms and could hardly move.