In this use case, a telecommunications company acts as an Identity Provider. The telecommunications company subscribers use the custom telecommunications company user portal to receive personalized content. The content is received by the telecommunications company from its business partners such as StockService.com, Weather.com, and so forth. OnCast, a new partner of the telecommunications company, uses Fedlets for its portal user single sign-on. Through the Fedlets, OnCast retrieves specific user attributes over SAML from the telecommunications company. OnCast then uses the user attribute data to customize its content deliver.
See the demonstration of this business use case at http://blogs.sun.com/sid/resource/fedlet.html .