If I work between two macs, is there a way to have a single unified user that I can switch between the two using a flash drive? Said differently, is there a way to to set it so that when I plug in a drive to a mac I'm using it would sinc all my user data (docs, music, bookmarks etc) to that drive. If I then went to my other computer I could then just plug it in and it would update that computer with changes or additions to the documents or whatever. It would also be cool if this could be done through a remote drive somewhere. Kind of like an isync for life but automatic so it would make both computers seem like they are the same.