You've had a bit of James Bond; now for some Mission: Impossible.
Or perhaps that should be Mission: Implausible, because this is going to take some believing. Get a load of this: Microsoft has filed a patent (according to the New Scientist, we should add, although we have no reason to doubt such an esteemed organ) for a USB key based around a leaking capacitor, so that any data stored on it is wiped after a mere hour.
Huh? What a ridiculous idea!
What's that? It's a sensible measure designed to protect sensitive security details of wireless networks and the like? Useful for storing configuration details and setup codes that could be damaging if lost? Brightly coloured to warn users of its unusual properties?
Oh well, fair enough then.
Full patent application here.