OK, assuming that the concept of an iPhone Nano are valid, and disregarding the size or form factor, what features would you consider to be mandatory for this to take off? Specifically, I'm interested in the existing apps from the current iPhone (with the exclusion of Phone, duh, it's assumed to be there already!) and not looking for added capability (like 3G, GPS, etc.). The idea is to take what they've already got with a reduced feature set for grandma and grandpa, younger kids, and others maybe interested in the iPhone conceptually but disinterested in the full range of capabilities, even at $399. Try and limit your choices to no more than, say, five or six features.