There are plenty of places for entrepreneurs to hone their skills, but none is quite as unique as “World of Warcraft,” says John Seely Brown, former director of Xerox PARC. In this entrepreneur thought leader lecture given at Stanford University last week, Brown praises the massively multiplayer online game, saying it’s a great way to learn crowdsourcing, how to work with groups and fosters an environment where performance is both measured and critiqued.