The Interactive Advertising Bureau has added sixteen new companies to its membership roster. Of the new members, seven are new general members and nine are new associate members. New General Members include Bellsouth, Crain's Modern Heathcare, LA Opinion Digital, Open Source Development Network (OSDN), Travelzoo Inc., UGO Networks, Inc. and WebMD. The general member category represents online publishers - companies that are actively engaged in the sale of interactive advertising. New Associate Members include Accipter, Click Squad, Commission Junction, Did-it.com, Euro RSCG, Fusebox, Oddcast, Point·Roll and Mediaplex, Inc. Associate members represent the perspective of companies that support the interactive advertising industry (for instance interactive or digital marketing companies) and are eligible to join any of IAB's sixteen committees. IAB member companies account for over seventy-five percent of the ad revenue generated via interactive advertising in the United States. Since January 2003, the IAB has added twenty-two new general members and twenty-seven new associate members.