The multiple accounts thing is a good point. I hadn't considered that, but it makes the "single user device" seem even sillier - why can I attach multiple accounts to a device that is otherwise completely inappropriate for multiple people to use at the same time?
I'm aware that the Touch is less expensive, but my argument is that "Just buy a separate device for your 4-year-old" is an insane line of reasoning, whether it's a $200 iPod or a $600 iPhone.
I'm aware that the Touch is less expensive, but my argument is that "Just buy a separate device for your 4-year-old" is an insane line of reasoning, whether it's a $200 iPod or a $600 iPhone.