Ghana won, 2-1, sending our team home from South Africa. Still, 19.4 million, the number registered by the Nielsen ratings service, is a lot of people. It’s not just more people than had ever watched a soccer game on American television before. It’s also more people than, on average, watched last year’s World Series games, which had the advantage of being broadcast live in prime time. It’s millions more than watched the Kentucky Derby or the final round of the Masters golf tournament or the Daytona 500, the jewel in NASCAR’s crown. And we don’t just watch. We do