PodLock creates hidden iPod partitions
If you're looking to hide important (read: embarrassing) files on your iPod, PodLock may be your answer. By creating invisible, password-protected volumes, PodLock keeps those situations in which you plug your iPod into a friend's computer a little less dangerous, embarrassing, or complex. It also defrags iPod hard drives, manages photos and voice recordings, and can help do some general iPod diagnostics. It sells for $65 (apparently, it used to sell for $39).
