For Tran, getting into the family perfume business meant bringing a new approach to selling fragrances and beauty products. After seeing the potential of the Web in 1999, she launched Perfume Bay, an online store that sells more than 800 brands and seeks to replicate the customer service of a department-store makeup counter.

Age: 29
Location: Huntington Beach,Calif.
Revenue: $9 million
Employees: 11