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It finally happened. Someone with a prosthetics lab has made a real 'Thumb Drive.' It's a 128MB version that is going for $30 right now on eBay, but they promise larger sizes are to come. I'm going to go whimper softly in a corner for a bit if you don't mind. (Thanks, William!)

REAL THUMB DRIVE usb2.0 1 OF A KIND pen flash 128MB [eBay]