ok so here is what you do! im like, the biggest iPod whore ever so i know my shyts. yo CAN sync to multiple PC's. what you have to do, is change the sync settings to "manually manage music" this means, when you hook up to a computer, you have to actually add the songs yourself. otherwise, everytime you connect to a computer, it will automatially do it. self explaintory. but as for syncin, all the songs will stay in your library. thats a sick ass EASY $100. send your buddy my way