DragonSteelMods posted a review on the USB Portable Paper Shredder from USBGeek
Our friends at USBGeek have sent over a USB Portable Paper Shredder that is obviously portable but works great, and it can be powered via USB or with standard 'AA' batteries. It's great for shredding that unwanted junk mail, and of course that stray private document that you might not want anyone else seeing...USB Portable Paper Shredder from USBGeek