Lexar Media's JumpDrive Trio is marketed as a portable SD Memory Card to USB reader. I see it as a convenient form factor for carrying an SD Memory Card in a pocket and then slapping the SD card in an ad hoc device. Such a device could be a PDA, tablet pc, etc. The key is that you don't own it before you show up, but thanks to the easily portable memory in the SD card, you can sign such a device out, and turn it into yours for a short period of time.
Bonus, you can easily attach the storage to any USB enabled device, read any desktop PC.
I'm thinking this is a great mechanism to get handhelds into a hospital, where you really would rather people didn't flat out own a particular PDA due to the potential for breakage. Also, if you feel like upgrading the devices, just ditch them, as long as you keep the key data in personal SD card.