How does the app store work? Is it like renting a movie on itunes, you can only put it on one device at a time? Meaning can I buy the app and put it on my touch and then when I get the iPhone transfer it off my touch to my mac and then to the phone? Can I put it on both? (Im dying to try super monkey ball and I cant get a iPhone anywhere 3 Att stores and 1 Apple store in my area.. NJ and theyr all gone! )Thanks.