In our second annual ranking, Business 2.0 has compiled an unabashedly subjective list of people, products, trends, and ideas that are transforming the world of business. | | Got a business question? Startup CEOs and other experts will answer them here. ( more) Meet 50 Who Matter winner Gina Bianchini. Her site, Ning, lets anyone be a social networking mogul. ( more) Our annual rankings show another banner year for the businesses leading the tech revival. ( more) | |