As we accumulate more and more apps on our iPhones, we acquire more and more specific "bundles of satisfactions" that address our individual needs or wants. This accumulation of apps inevitably includes a cluster of "must have" or "can't go without" apps, too. While we are pleased to have such useful tools, it is also necessary to note that we are forging, to some extent, chains that bind us to the iPhone platform. If your particular set of must have apps are not available on any other platform, it is less likely that we will jump to another competing smartphone platform. I think that we all have enjoyed having "number portability" here in the USA; that simply means that when we move from one wireless provider to another, we can choose to take the same phone number with us. What about "app portability?" I don't think that anyone has addressed this before. It seems to me that app portability may grow into some importance in the future. What do you think about that?