Charles Mangin made a USB flash drive that fits inside a stack of two 3.5 inch floppy disks:
I extended the original cable from the business card USB drive, and routed it through a small piece of plastic, glued in place just inside the opening. This lets out just enough of the cable to plug into a hub or laptop, but prevents me pulling the wires all the way out.
Link via Technabob | Maker's Website
http://www.youtube.com/watch?v=ojNYill9oBM
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