A method for use of a media system comprising at least one component device, comprising: providing, to a user interface of a control device of the media system, first media availability data that indicates first media available for rendering by a component device (102-124, 902) of the media system; receiving, via a user interface of a mobile device, a selection of second media (910, 912, 914) to add to a queue accessible by the component device (102-124, 902); wherein: the mobile device is in communication with the media system; and the second media (910, 912, 914) is provided by a streaming media service that is accessible over a network and is accessed via an application on the mobile device; receiving data indicating an addition of the second media (910, 912, 914) accessible by the mobile device to the queue, wherein the second media that was added to the queue is not accessible by the media system when the mobile device is not connected to the media system; after receiving the data indicating the addition of the second media (910, 912, 914) to the queue, providing to the user interface of the control device of the media system, second media availability data (930, 1006) that indicates that the added second media (910, 912, 914) is additionally available for rendering by the component device (102-124, 902); determining that the second media (910, 912, 914) is no longer accessible by the component device (102-124, 902) when the mobile device is one of: no longer in communication with the media system; and has a strength of communication with the media system that is below a threshold level; in response to determining that the second media (910, 912, 914) is no longer accessible: initiating a query for equivalent media (910', 912', 914') that is equivalent to the second media (910, 912, 914) on media sources (904, 906, 962) accessible by the component device (102-124, 902); and replacing, in the queue, the second media (910, 912, 914) with the equivalent media (910', 912', 914') from media sources (904, 906, 962) accessible by the component device (102-124, 902). providing, to a user interface of a control device of the media system, first media availability data that indicates first media available for rendering by a component device (102-124, 902) of the media system; receiving, via a user interface of a mobile device, a selection of second media (910, 912, 914) to add to a queue accessible by the component device (102-124, 902); wherein: the mobile device is in communication with the media system; and the second media (910, 912, 914) is provided by a streaming media service that is accessible over a network and is accessed via an application on the mobile device; the mobile device is in communication with the media system; and the second media (910, 912, 914) is provided by a streaming media service that is accessible over a network and is accessed via an application on the mobile device; receiving data indicating an addition of the second media (910, 912, 914) accessible by the mobile device to the queue, wherein the second media that was added to the queue is not accessible by the media system when the mobile device is not connected to the media system; after receiving the data indicating the addition of the second media (910, 912, 914) to the queue, providing to the user interface of the control device of the media system, second media availability data (930, 1006) that indicates that the added second media (910, 912, 914) is additionally available for rendering by the component device (102-124, 902); determining that the second media (910, 912, 914) is no longer accessible by the component device (102-124, 902) when the mobile device is one of: no longer in communication with the media system; and has a strength of communication with the media system that is below a threshold level; no longer in communication with the media system; and has a strength of communication with the media system that is below a threshold level; in response to determining that the second media (910, 912, 914) is no longer accessible: initiating a query for equivalent media (910', 912', 914') that is equivalent to the second media (910, 912, 914) on media sources (904, 906, 962) accessible by the component device (102-124, 902); and replacing, in the queue, the second media (910, 912, 914) with the equivalent media (910', 912', 914') from media sources (904, 906, 962) accessible by the component device (102-124, 902). initiating a query for equivalent media (910', 912', 914') that is equivalent to the second media (910, 912, 914) on media sources (904, 906, 962) accessible by the component device (102-124, 902); and replacing, in the queue, the second media (910, 912, 914) with the equivalent media (910', 912', 914') from media sources (904, 906, 962) accessible by the component device (102-124, 902).