I'd suggest you use a software encryption. Hardware is too... um, permanent. And all things security will eventually need an upgrade:

http://it.slashdot.org/story/10/01/05/1734242/Encryption-Cracked-On-NIST-Certified-Flash-Drives

You could use something like Windows Bitlocker as noted by Lono, or something like Truecrypt.

-john