By bringing together like-minded individuals who support a business, enjoy a specific entertainer or are passionate about a specific cause, online communities can reach a significant level of activity and connectivity, which then encourages its members to spend more time on the site, visit more regularly and interact more with others there.

FORBES: Social Media: Evolving From Broadcasting To Conversation

Because we are about 5, 000 miles from Japan, and radiation is dispersed and diluted over distance, it is highly unlikely that any significant level would reach our shores.

FORBES: Radiation No Threat To Silicon Valley, Santa Clara County Says