1. A method for use in connection with delivering assets to users of a broadcast network, the broadcast network primarily involving synchronized distribution of broadcast content to multiple users, the method comprising: monitoring at least one textual field associated with programming for delivery via said broadcast network; based on textual information from the at least one textual field, identifying assets from a collection of assets having at least partially matching textual constraints; and inserting a selected one of the identified assets into a content stream of the broadcast network, wherein said selected asset is broadcast in conjunction with said programming.