1. A method of dynamic, user-directed arrangement and delivery of media, comprising: within a computing environment comprised of at least one computer processor, and at least one computer-readable storage medium operably coupled to the at least one computer processor, the at least one computer processor operable to execute a plurality of program instructions to perform the steps of: receiving 1) one or more media files designated by at least one user, at the direction of the at least one user, or from another user associated with the at least one user, and 2) additional content that includes one or more third-party media files, into a disparately-maintained content library that is continually updated at least as the one or more media files are designated; applying one or more artificial intelligence techniques to adaptively relate the one or more media files and the additional content in an interactive index of the disparately-maintained content library, by 1) developing a user profile by identifying and continually updating user characteristics from a) interaction via an interface to collect user-specified media preferences, b) recipient-specified media preferences, and c) inferences obtained from the disparately-maintained content library, and 2) developing a set of content rules for framing a content boundary, the user profile and the set of content rules providing the at least one user with direct control over arrangement and delivery of the one or more media files and the additional content in at least one media stream to one or more devices associated with credentials assigned by the at least one user, and the user profile and the set of content rules are continually updated to dynamically modify the at least one media stream in real time; relating one or more of a user interaction and a recipient interaction with the at least one media stream to dynamically influence the interactive index and further adaptively relate the one or more media files and the additional content, so that the at least one media stream is further dynamically modified in a real-time response to the one or more of a user interaction and a recipient interaction, and as further media files and further content is received; and delivering the at least one media stream to the one or more devices designated by credentials assigned by the at least one user.