I'm interested to learn from a technical perspective why some of Sirius' extra app channels allow you to skip songs while others don't. It seems that the ones that do are not actual live "radio" feeds per se but rather act almost like Pandora stations. I'm guessing they just load a bunch of songs in a playlist and every time a listener plays one of those channels, it plays things at random like a Pandora station while the regular channels are actual live feeds? Seems that way.