Keyword: social media

Social media is great. Not only can you harness its power to start revolutions and circulate videos of furry animals doing cute things — you can help save someone's life. About three weeks ago, San Francisco-based Photojojo and Jelly co-founder Amit Gupta was diagnosed with acute leukemia. The 32-year-old entrepreneur is currently undergoing treatment, and the next step for him is a bone-marrow transplant.

A month ago Chinese dissident artist Ai Weiwei — jailed for "economic crimes" — was released on bail under the conditions that he pay back his alleged unpaid taxes and, more importantly, maintain media silence, including through Twitter for "one year, at least."