1. An information delivery system comprising, in combination, a data communications network, a plurality of network services connected to said network, a plurality of service consumers connected to said network, and a syndicator connected to said network, said syndicator comprising, in combination, a service registry for storing a plurality of service descriptions each of which describes a particular one of said network services and each of which comprises, in combination: the network address to which a request message may be to sent via said network to invoke the performance of said particular one of said network services, an input description specifying one or more characteristics of said request message, an output description specifying one or more characteristics of the output information produced by the performance of said particular one of said network services in response to said request message, and business information describing the terms upon which said output information may be provided to service consumers by said particular one of said network services, a subscription manager for receiving an acceptance from a specific one of said service consumers of the terms upon which output information may be provided as specified by the business information describing a specific one of said network services to thereby establish a subscription relationship between said specific one of said service consumers and said specific one of said network services, a message handler for receiving a service request via said network designating said specific one of said network services from said specific one of said service consumers, a subscription validator responsive to the receipt of said service request for verifying that a subscription relationship has been established between said specific one of said service consumers and said specific one of said network services, means responsive to the verification of said subscription relationship by said subscription validator for transmitting a request message to the network address specified in the service description for said specific one of said network services to invoke the performance thereof, and means responsive to the performance of said specific one of said network services for returning information produced by said performance to said specific one of said network consumers.