Registered users with a server computer system designate their preferences with respect to specified products and/or services by making a selection via a user-selectable area on a client computer. These preferences are then stored in an online repository coupled to the Internet. The online repository permits users to update their preferences. Marketing entities that wish to market products and/or services to the users are designated by the online repository as recipients of updates to user preferences. Based on these updated user preferences, marketing entities are enabled to provide marketing information to the registered users.