I have heard this a number of times as a criticism of the iPad, but I can't figure out what this would allow a user to actually do. The only two things I can think I might want to be able to do are to use my iOS device to move random computer files around like a USB drive (I have an app for that, though) and to be able to open files with a number of different apps that can use the same type of file (listen on the iPod app and edit in Garage Band?) But that doesn't need a full file system, it just needs a "music" folder, or a "movies" folder that all music or video apps can access. So what is it that people want from a "full file system" that is so important to their iPad experience?