Apple today announced that it will be making changes to its affiliate program for its digital content stores, bringing on a new partner to help expand participation to new countries. Under Apple's affiliate programs, participants can earn commissions on revenue generated through links to the iTunes Store, App Store, Mac App Store, and iBookstore in various countries. The program also provides a number of tools to help website owners add digital content from Apple to their sites. The existing program uses four separate affiliate networks to provide coverage for a number of countries: - LinkShare: United States, Canada and Mexico - Tradedoubler: Europe and Brazil - LinkShare