Am currently just in the conceptual stages but some sort of device where you plug in a bunch of ipods and then can select a song from any of them to play as wel

Am currently just in the conceptual stages but some sort of device where you plug in a bunch of ipods and then can select a song from any of them to play as well as queuing music etc. Is cool because at parties etc. means you don't have to continually switch ipods to put on 'That song'