1. A method for subscribing to a podcast said method comprising: at a client device in communication with a host device arranged to store the podcast, receiving a portable subscription file that is used to facilitate subscribing to the podcast; accessing the portable subscription file to obtain podcast information; and subscribing to the podcast using the podcast information, wherein the portable subscription file includes an application identifier, and a network address for a podcast feed, wherein the portable subscription file is used to pass subscription information through a data network from the client device to at least another client device without interaction with the host device thereby allowing the another client device to subscribe to the podcast associated with the podcast feed.