There's a few reasons I love this Studded USB Bag Charm ($45): One, you can stuff 2GB worth of documents, music, and photo files for easy transportation. Two, you wouldn't know it was a flash drive even if you studied it, which makes it great for toting sensitive documents on the go.
Sensitive documents you say? Here's an example: clip this on your leather messenger bag or keychain when you're traveling abroad, and keep a copy of your passport, itinerary, hotel information, credit cards, and emergency contacts on you at all times — just in case you lose your luggage (or worse, it gets stolen). The clip blends in well enough not to stand out, and you won't forget it in your hotel room if it's attached to your day bag. And let's face it — this is probably one of the most stylish, portable flash drives you've ever seen, so you should grab it either way.