1. A method of identifying content for delivery to a mobile device, comprising: receiving, at a server, a message that includes a set of attributes associated with the mobile device, wherein the set of attributes comprise at least one of position, speed, and direction data for the mobile device or compass orientation data for a sensor of the mobile device; identifying, by the server, a set of media sources available in a network; and identifying, by the server, content available from at least a subset of the set of media sources for delivery to the mobile device based on access criteria comprising at least one of: (a) the position, speed, and direction data for the mobile device, wherein the mobile device generates the position, speed, and direction data, or (b) the compass orientation data for the sensor of the mobile device.