Whether you want to separate work from your personal life, his from hers, or your stuff from that other personality you call "Bad Charlie", the Split Stick gives you two separate flash drives in one USB device.
The drive is divided in half—2GB on each side. So separating files is as simple as choosing which side to stick into the computer. The drive also comes in several colors and includes the option of laser etching text or icons on either side of the switch to help you distinguish between drives. Available for $20. [Split Stick]