One of the features I've missed from the classic iPods is the ability to plug the devices into a computer in order to directly access their hard drives or flash memory. When I was in school, I didn't carry a USB key around with me because I always had my iPod and everyone had the cables handy. While there is software that can transfer files between an iPhone and a PC, we're generally not permitted to install programs on shared computers.
One solution is roqyUSB, a jailbreak utility that allows users to create virtual hard disks which can be accessed by USB. This isn't the first virtual USB drive we've seen for jailbroken devices, but it is the first we've seen in a default repository...