When I saw Steve Jobs showing off the new mobile iTunes music store, my first thought was, wow, as if the device wasn't attractive enough to thieves, now they can steal the device and buy more songs off the owner's credit card.
Luckily, Apple thought of that too. I caught up with iPod executive Greg Joswiak after the keynote and he said that the device actually requires users to enter their password before buying anything unless they've entered their password in the last 15 minutes.
It would still suck to have your iPod and all your tunes nabbed, but at least one won't have to bear the thought (and cost) of having a thief expand the music collection on your dime.
Still, like the iPhone, this device can easily have a lot of your personal information on it. Like the other drawbacks, it won't make me not get one, but it probably will keep me from storing as much information as I might otherwise.