Probably not quite what the designers intended, but... I plan to put one in an aluminium box with some SRAM and an anti-tamper switch, store keys in the SRAM a

Probably not quite what the designers intended, but... I plan to put one in an aluminium box with some SRAM and an anti-tamper switch, store keys in the SRAM and use it to back up TrueCrypted thumb drives. Should be more secure than mounting them on an internet-connected PC just to back them up.