How do you engage the visitors on your site? How do you work to develop new interactivity? A lot of insight can be gleaned from the experiences of the people who are out there getting their feet wet, building online communities from scratch. Here is an interview with Roberto Sarrecchia, owner of qmpeople , a social network with some original features. Disclosure: qmpeople is a Pandia Sponsor. Pandia: Your site has been online since 2004,