I presume you're just looking to copy stuff on or off the device.
If you end up looking for alternatives to a USB device, here's what I do...
I keep a 6-in-1 PCMCIA PC Card Adapter handy and loaded with an SD card. Works flawlessly! SD cards are becoming more common for copying stuff around, plus the 6-in-1 gives me a tool that'll accomodate a wide variety of formats.
Cheers!