Bad times have hit sunnily optimistic northern California. Does it matter if the mayhem on Wall Street had any real connection with the tech-powered Silicon Valley economy? Some of the region's most influential power brokers believe it will.

Bad times have hit sunnily optimistic northern California. Does it matter if the mayhem on Wall Street had any real connection with the tech-powered Silicon Valley economy? Some of the region's most influential power brokers believe it will.