We've been waiting a long time for political upheaval to follow in the wake of technological change, and on April 7, it seemed to have arrived. From Moldova, of all places, came news of the Twitter Revolution: In one of the poorest backwaters in Europe -- a place that frequently features in global surveys as the world's unhappiest country -- a group of fresh-faced young people reportedly used Twitter tweets, text messages and Facebook postings to organize a demonstration in favor of democracy and against rigged elections. New technology confronted old autocracy in an almost made-for-the-front-pages storyline: On one side, the Moldovan communist president, Vladimir Voronin, a man who is not only a former Soviet secret police boss but -- amazing coincidence! -- also the father of the...