There’s a new marketing catchphrase that’s getting rave word-of-mouth reviews. From articles in the popular press to conversations in the classroom, huge companies to boutique marketing firms, suddenly it seems you can’t talk about new products without addressing ‘buzz marketing.’ “People are buzzing about buzzing,” says Wharton marketing professor Barbara Kahn . “People think it’s cool. There is something almost empowering about the idea of being able to ‘buzz’ your way into the products people buy.” Buzzing: What Is It? Put simply, buzz marketing is the practice of gathering volunteers to try products, then sending them out into the world to talk up their experiences with the people they meet in their daily lives. The idea is that the more people see a product being used in public, or the more they hear about it from people they know and trust, the more likely they will be to buy it for themselves.…