Rap infects all popular culture. The Jubilee campaign led to billions of dollars of developing world debt being written off. Linux is one of the biggest challengers to Microsoft. The Sims is one of the most popular computer games ever. These developments have one thing in common: they were all driven by Pro-Ams, innovative, committed and networked amateurs working to professional standards... According to many commentators, the 1990s were a decade in which large corporations were rampant, their control over society virtually unchallenged. Yet the rise of Pro-Ams suggests counter trends were at work as well.