Sorry if this has been answered before, i did search but there only seems to be threads about not getting it to work. My question is HOW does it work? I understand that when you do it via iTunes it sents it up to the cloud, along with millions of other users, so it can give a list that's most appropriate. But when it's on the iPod Touch/Nano, how does it do it? I'm assuming it doesn't need wi-fi to operate as it wouldn't work on the Nano would it? So how, does it like find which genre they belong to and do it that way or is it synced information from the iTunes library itself?