Today is Labor Day which is meant to celebrate the workers movement (as an aside, in Germany and much of the rest of the world this is held on May 1). That might be a good time to think about what organizing labor might mean in the future. One of the major economic trends we are currently seeing is the breakdown of traditional employment and the rise of labor marketplaces for free lancers, such as Uber, Task Rabbit and WorkMarket (to name just a few). The valuations for at least some of these...