1. A system comprising: a behavioral information collector operable to monitor communication traffic exchanged with a communication network subscriber over an access communication link, the access communication link enabling the subscriber to access electronic content, the behavioral information collector being configurable to collect from any of a plurality of types of communication traffic in the monitored communication traffic behavioral information indicative of behavior of the subscriber in using the access communication link; a behavioral analyzer operatively coupled to the behavioral information collector and operable to maintain a behavioral profile of the subscriber that reflects ongoing behavior of the subscriber, based on behavioral information collected from only one or more particular types of the plurality of types of communication traffic in the monitored communication traffic, maintenance of the behavioral profile being unaffected by behavioral information collected from types of communication traffic other than the one or more particular types of communication traffic; and an electronic content delivery controller operatively coupled to the behavioral analyzer and operable to control, based on the behavioral profile, delivery of targeted electronic content to the subscriber for presentation with electronic content accessed by the subscriber, wherein at least one of the behavioral information collector, the behavioral analyzer, and the electronic content delivery controller is implemented using hardware, wherein the access communication link comprises a network link in an access network, the access network comprising an electronic content source that is operable to deliver the accessed electronic content to the subscriber, wherein the electronic content source provides an Internet Protocol Television (IPTV) service, and wherein the electronic content delivery controller is further operable to select the targeted electronic content from targeted electronic content provided by multiple targeted electronic content providers.