I recently purchased this swiss army knife, which is an innovative and useful gadget. It's very small and almost weightless - perfect to carry in your pocket. The USB drive disconnects and is available with 1GB or 2GB of memory. If purchasing as a gift, you can also have it inscribed.
Now, if you like this idea, but aren't a knife person, USB drives can be hidden in just about anything, such as a pen. I haven't purchased one yet but the reviews reflect a common complaint that the USB drive works but pen portions are constructed poorly. If anyone has found a quality one, would you please let me know? I'd love to put my podcasts on the USB and gift them as gifts on occasion.
