Don't forget about the Hitch
The Hitch USB transfer device is going with me on vacation next week. I plan to use it to transfer the photos I take to the PSP or a spare 2 Gig USB drive.
The Hitch has a port on the left and right sides for any USB device and a LCD screen for easy use. I've used it to move data to the PSP and a USB drive also to move data between USB drives.
It would be nice if it had some kind of built in drive of its own (8 Gig or so) but its only a smart "traffic cop" so to speak.
Costs about $100 at Best Buy or etc.
Worth a look!